{"id":17845,"date":"2019-01-19T12:00:49","date_gmt":"2019-01-19T11:00:49","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=17845"},"modified":"2019-01-17T20:57:29","modified_gmt":"2019-01-17T19:57:29","slug":"lune-la-chine-envisage-de-construire-une-base-en-utilisant-limpression-3d","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/lune-la-chine-envisage-de-construire-une-base-en-utilisant-limpression-3d\/","title":{"rendered":"Lune: La Chine envisage de construire une base en utilisant l&rsquo;impression 3D"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>La mission Chang\u2019e-8 sera destin\u00e9e \u00e0 tester des \u00e9quipements en vue de la construction d\u2019une base internationale de recherche lunaire\u2026<\/p>\n<p>Apr\u00e8s le succ\u00e8s de l\u2019atterrissage de la sonde Chang\u2019e-4 sur la face cach\u00e9e de la Lune, la Chine veut continuer sa conqu\u00eate de notre satellite naturel.<\/p>\n<p>Le pays cherche ainsi \u00e0 \u00e9tablir, un jour, une base internationale sur la Lune, a annonc\u00e9 lundi l\u2019agence spatiale chinoise CNSA (China National Space Administration). Elle envisage notamment l\u2019utilisation de la technologie d\u2019impression en 3D pour construire des installations.<\/p>\n<p>Quatre autres missions programm\u00e9es<br \/>\nApr\u00e8s Chang\u2019e-4, quatre autres missions lunaires sont planifi\u00e9es. Le lancement d\u2019un module d\u2019exploration Chang\u2019e-5 devrait intervenir avant la fin de l\u2019ann\u00e9e. L\u2019objectif sera de recueillir des \u00e9chantillons et de les rapporter sur Terre. Chang\u2019e-6 devra ensuite rassembler des \u00e9chantillons du p\u00f4le sud de la Lune. La mission suivante se livrera, elle, \u00e0 une exploration compl\u00e8te cette zone, y compris sa topographie, sa composition et son environnement spatial.<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"17849\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/lune-la-chine-envisage-de-construire-une-base-en-utilisant-limpression-3d\/china-base-lunaire-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-1.jpg?fit=634%2C300&amp;ssl=1\" data-orig-size=\"634,300\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"china.base-lunaire\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-1.jpg?fit=634%2C300&amp;ssl=1\" class=\"alignnone size-full wp-image-17849\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-1.jpg?resize=634%2C300&#038;ssl=1\" alt=\"\" width=\"634\" height=\"300\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-1.jpg?w=634&amp;ssl=1 634w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-1.jpg?resize=300%2C142&amp;ssl=1 300w\" sizes=\"auto, (max-width: 634px) 100vw, 634px\" \/><\/p>\n<p>La derni\u00e8re des missions, Chang\u2019e-8, sera destin\u00e9e \u00e0 tester des \u00e9quipements en vue d\u2019une base internationale de recherche lunaire, a pr\u00e9cis\u00e9 Wu Yanhua, chef adjoint du Programme d\u2019exploration lunaire de la Chine. \u00ab La Chine, les Etats-Unis, la Russie et l\u2019Europe discutent tous de la construction d\u2019une base ou d\u2019une station de recherche sur la Lune \u00bb, a-t-il indiqu\u00e9. D\u2019apr\u00e8s lui, les scientifiques se livrent \u00e0 des recherches pour savoir \u00ab si nous pouvons utiliser la technologie d\u2019impression 3D \u00bb pour construire des installations lunaires.<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"17864\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/lune-la-chine-envisage-de-construire-une-base-en-utilisant-limpression-3d\/moon-mining\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/Moon-Mining.png?fit=640%2C354&amp;ssl=1\" data-orig-size=\"640,354\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Moon-Mining\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/Moon-Mining.png?fit=640%2C354&amp;ssl=1\" class=\"alignnone size-full wp-image-17864\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/Moon-Mining.png?resize=640%2C354&#038;ssl=1\" alt=\"\" width=\"640\" height=\"354\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/Moon-Mining.png?w=640&amp;ssl=1 640w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/Moon-Mining.png?resize=300%2C166&amp;ssl=1 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>Succ\u00e8s pour l\u2019alunissage de Chang\u2019e-4<br \/>\nLa Chine, dont le programme spatial est g\u00e9r\u00e9 par l\u2019Arm\u00e9e populaire de lib\u00e9ration (APL), a marqu\u00e9 une grande avanc\u00e9e en devenant le 3 janvier le premier pays \u00e0 faire alunir un v\u00e9hicule sur la face cach\u00e9e de la Lune. Le module Chang\u2019e-4, qui avait quitt\u00e9 la Terre le 8 d\u00e9cembre, transportait un petit robot t\u00e9l\u00e9guid\u00e9 \u00e0 roues, le Yutu-2 (\u00ab Lapin de Jade 2 \u00bb).<\/p>\n<p>Ce dernier a quitt\u00e9 la sonde quelques heures apr\u00e8s l\u2019alunissage pour r\u00e9aliser des analyses dans le crat\u00e8re Von Karman, le plus grand crat\u00e8re d\u2019impact connu dans le syst\u00e8me solaire. Il a repris jeudi dernier ses activit\u00e9s apr\u00e8s avoir hibern\u00e9 cinq jours pour se prot\u00e9ger du froid. \u00ab Ce sera la premi\u00e8re fois que nous pourrons \u00e9tudier l\u2019origine et la formation de la face cach\u00e9e de la Lune et m\u00eame l\u2019\u00e2ge de la Lune \u00bb, a expliqu\u00e9 Wu Weiren, l\u2019ing\u00e9nieur en chef du programme chinois d\u2019exploration lunaire.<\/p>\n<p>Le professeur Guo Linli de l&rsquo;Institut d&rsquo;ing\u00e9nierie des syst\u00e8mes spatiaux habit\u00e9s de la CAST a pr\u00e9sent\u00e9 la base lors de la Conf\u00e9rence mondiale sur l&rsquo;exploration spatiale (&nbsp;GLEX&nbsp;) \u00e0 Beijing en juin 2017, qui d\u00e9taille une conception permettant des s\u00e9jours humains de longue dur\u00e9e sur la Lune, avec les objectifs suivants: recherche scientifique, exp\u00e9riences techniques et utilisation des ressources.<\/p>\n<p>Bien que loin d\u2019\u00eatre un plan officiel, le concept examine les motivations possibles ainsi que la recherche, les syst\u00e8mes et les technologies n\u00e9cessaires, et pourrait servir de base \u00e0 un futur projet lunaire humain concret ou l\u2019influencer.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>Le corps principal int\u00e9rieur de la base lunaire humaine int\u00e9gr\u00e9e comprend un module d&rsquo;habitation, un module de laboratoire et un module de support, reli\u00e9s entre eux par des structures articulaires extensibles, mais s\u00e9par\u00e9s et relativement ind\u00e9pendants les uns des autres, pour des raisons de besoins psychologiques et de sant\u00e9 personnelle.<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"17851\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/lune-la-chine-envisage-de-construire-une-base-en-utilisant-limpression-3d\/expandable-joints-china-concept-moon-base-cast\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/expandable-joints-china-concept-moon-base-cast.png?fit=679%2C519&amp;ssl=1\" data-orig-size=\"679,519\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"expandable-joints-china-concept-moon-base-cast\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/expandable-joints-china-concept-moon-base-cast.png?fit=679%2C519&amp;ssl=1\" class=\"alignnone size-full wp-image-17851\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/expandable-joints-china-concept-moon-base-cast.png?resize=679%2C519&#038;ssl=1\" alt=\"\" width=\"679\" height=\"519\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/expandable-joints-china-concept-moon-base-cast.png?w=679&amp;ssl=1 679w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/expandable-joints-china-concept-moon-base-cast.png?resize=80%2C60&amp;ssl=1 80w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/expandable-joints-china-concept-moon-base-cast.png?resize=300%2C229&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/expandable-joints-china-concept-moon-base-cast.png?resize=70%2C53&amp;ssl=1 70w\" sizes=\"auto, (max-width: 679px) 100vw, 679px\" \/><\/p>\n<p>Le module de salle de s\u00e9jour contiendrait la cuisine, la salle de sport, les toilettes et les installations n\u00e9cessaires, avec le syst\u00e8me de communication, l&rsquo;ordinateur principal, les syst\u00e8mes de contr\u00f4le central et de secours situ\u00e9s dans le module de support.&nbsp;Les consid\u00e9rations relatives aux situations d&rsquo;urgence sont \u00e9galement d\u00e9taill\u00e9es, chaque habitat disposant de trois sorties, dont l&rsquo;une vers un mobile sous pression pouvant acheminer des astronautes vers une zone de lancement \/ atterrissage.<\/p>\n<p>L&rsquo;approvisionnement en eau pourrait doubler en tant que couche protectrice dans les murs des habitats pour assurer une protection contre les radiations.<\/p>\n<p>Les sp\u00e9cifications principales indiquent que la base devrait avoir une dur\u00e9e de vie nominale d&rsquo;au moins 8 ans, \u00eatre capable d&rsquo;accueillir 3 \u00e0 6 astronautes \u00e0 la fois pendant des p\u00e9riodes \u00e9gales ou sup\u00e9rieures \u00e0 3 mois et pouvoir fonctionner automatiquement sans pr\u00e9sence humaine.<\/p>\n<p>La lune pourrait-elle alimenter la Terre pendant 10 000 ans? La Chine estime que l&rsquo;extraction d&rsquo;h\u00e9lium sur notre satellite pourrait aider \u00e0 r\u00e9soudre la crise \u00e9nerg\u00e9tique mondiale.<\/p>\n<ul>\n<li>Helium 3 est d\u00e9vers\u00e9 \u00e0 la surface de la lune en grande quantit\u00e9 par le vent solaire<\/li>\n<li>Le rare isotope de l&rsquo;h\u00e9lium pourrait propulser des usines de fusion propres sur Terre<\/li>\n<li>Il pourrait \u00eatre extrait de la lune en chauffant la poussi\u00e8re lunaire \u00e0 600 \u00b0 C<\/li>\n<li>Les astronautes transporteraient ensuite le mat\u00e9riau non radioactif vers la Terre<\/li>\n<li>La Chine a manifest\u00e9 son int\u00e9r\u00eat, mais elle n\u2019a pas encore d\u00e9fini de plans concrets sur la mani\u00e8re dont elle exploiterait la lune pour trouver de l\u2019h\u00e9lium.<\/li>\n<\/ul>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"17852\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/lune-la-chine-envisage-de-construire-une-base-en-utilisant-limpression-3d\/china-base-lunaire-3\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-2.jpg?fit=634%2C868&amp;ssl=1\" data-orig-size=\"634,868\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;\\u00a9 Images: ExplainingTheFuture.com&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"china.base-lunaire\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-2.jpg?fit=584%2C800&amp;ssl=1\" class=\"alignnone size-full wp-image-17852\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-2.jpg?resize=634%2C868&#038;ssl=1\" alt=\"\" width=\"634\" height=\"868\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-2.jpg?w=634&amp;ssl=1 634w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-2.jpg?resize=219%2C300&amp;ssl=1 219w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire-2.jpg?resize=584%2C800&amp;ssl=1 584w\" sizes=\"auto, (max-width: 634px) 100vw, 634px\" \/><\/p>\n<p class=\"mol-para-with-font\">Aujourd&rsquo;hui, la Chine cherche \u00e0 exploiter la Lune \u00e0 la recherche du rare isotope de l&rsquo;h\u00e9lium qui, selon certains scientifiques, pourrait r\u00e9pondre \u00e0 la demande \u00e9nerg\u00e9tique mondiale dans le futur, selon un article paru dans&nbsp;<a href=\"https:\/\/www.laterredufutur.com\/accueil\/helium-3-le-nouveau-jeu-mondial-qui-va-nous-apporter-la-revolution-energetique-et-spatiale\/\" target=\"_blank\" rel=\"nofollow noopener\">le Times, et ici sur la Terre du Futur.<\/a><\/p>\n<p class=\"mol-para-with-font\">Le professeur Ouyang Ziyuan, scientifique en chef du programme d&rsquo;exploration lunaire chinoise, a r\u00e9cemment d\u00e9clar\u00e9 que la lune \u00e9tait \u00ab\u00a0tellement\u00a0\u00bb riche en h\u00e9lium 3 que cela pourrait \u00ab\u00a0r\u00e9soudre la demande \u00e9nerg\u00e9tique de l&rsquo;humanit\u00e9 pendant environ 10 000 ans au moins\u00a0\u00bb.<\/p>\n<p>Adaptation <a href=\"https:\/\/www.laterredufutur.com\/accueil\/\">La Terre du Futur<\/a><\/p>\n<p>sources : <a href=\"https:\/\/www.20minutes.fr\/sciences\/2424003-20190115-lune-chine-envisage-construire-base-utilisant-impression-3d\" target=\"_blank\" rel=\"noopener\">https:\/\/www.20minutes.fr\/<\/a> \/ <a href=\"https:\/\/gbtimes.com\/living-on-the-moon-a-chinese-conceptual-lunar-base\" target=\"_blank\" rel=\"noopener\">https:\/\/gbtimes.com\/<\/a> \/ <a href=\"https:\/\/www.dailymail.co.uk\/sciencetech\/article-2716417\/Could-moon-fuel-Earth-10-000-years-China-says-mining-helium-satellite-help-solve-worlds-energy-crisis.html\" target=\"_blank\" rel=\"noopener\">https:\/\/www.dailymail.co.uk<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"17845\">(283)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>La mission Chang\u2019e-8 sera destin\u00e9e \u00e0 tester des \u00e9quipements en vue de la construction d\u2019une base internationale de recherche lunaire\u2026&#8230;<\/p>\n","protected":false},"author":1,"featured_media":17847,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Lune: La Chine envisage de construire une base en utilisant l'impression 3D @laterredufutur","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22],"tags":[2235,6895,537,6938,122],"class_list":["post-17845","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-base-lunaire","tag-change-4","tag-chine","tag-impression-en-3d","tag-lune","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/china.base-lunaire.jpg?fit=717%2C536&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-4DP","jetpack-related-posts":[{"id":17678,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-robot-lunaire-chinois-pourrait-etre-a-la-recherche-de-carburant-interplanetaire\/","url_meta":{"origin":17845,"position":0},"title":"Le robot lunaire chinois pourrait \u00eatre \u00e0 la recherche de carburant interplan\u00e9taire","author":"Admin","date":"10 janvier 2019","format":false,"excerpt":"La Chine a pour ambition de s'installer durablement sur la Lune. Mais pour y parvenir de nombreux sauts technologiques sont \u00e0 franchir. Les prochaines missions robotiques ont justement pour but de pr\u00e9parer cette installation. 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