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　　此??(ci)次?(ci)出??(chu)艙??(cang)??，神??(shen)舟??(zhou)十??(shi)九??(jiu)號??(hao)航??(hang)天??(tian)員??(yuan)蔡?(cai)旭??(xu)哲??(zhe)和??(he)宋??(song)令??(ling)東??(dong)身??(shen)著??(zhe)中??(zhong)國??(guo)空??(kong)間??(jian)站?(zhan)艙??(cang)外??(wai)航??(hang)天??(tian)服??(fu)??，圓??(yuan)滿??(man)完?(wan)成??(cheng)出??(chu)艙??(cang)活??(huo)動??(dong)??。??至??(zhi)此??(ci)??，中??(zhong)國??(guo)空??(kong)間??(jian)站??(zhan)艙??(cang)外??(wai)航??(hang)天??(tian)服??(fu)已?(yi)經??(jing)圓??(yuan)滿??(man)保?(bao)障??(zhang)空??(kong)間??(jian)站??(zhan)任??(ren)務??(wu)以??(yi)來?(lai)的??(de)19次?(ci)出??(chu)艙??(cang)活??(huo)動??(dong)??，使??(shi)用?(yong)年??(nian)限??(xian)次??(ci)數??(shu)超?(chao)出??(chu)“3年??(nian)15次??(ci)”的?(de)壽??(shou)命??(ming)設?(she)計??(ji)指??(zhi)標??(biao)??。空??(kong)間??(jian)站??(zhan)艙?(cang)外?(wai)航??(hang)天?(tian)服??(fu)是??(shi)我??(wo)國??(guo)首??(shou)個??(ge)在??(zai)軌??(gui)開??(kai)展??(zhan)壽??(shou)命?(ming)評??(ping)估??(gu)工??(gong)作??(zuo)的?(de)飛??(fei)行?(xing)產??(chan)品??(pin)???！　≈??(zhong)國??(guo)航??(hang)天??(tian)科??(ke)技??(ji)集?(ji)團??(tuan) 李??(li)學??(xue)東?(dong)：后??(hou)續(xù)??(xu)還??(hai)有??(you)一??(yi)些??(xie)防??(fang)護??(hu)維??(wei)修??(xiu)任??(ren)務??(wu)??，但??(dan)不??(bu)是??(shi)很??(hen)多??(duo)了??(le)??，還??(hai)有??(you)別??(bie)的??(de)出?(chu)艙??(cang)任??(ren)務??(wu)??，包?(bao)括??(kuo)新??(xin)技??(ji)術??(shu)驗??(yan)證??(zheng)??，現??(xian)在??(zai)近??(jin)地??(di)軌??(gui)道??(dao)商??(shang)業(yè)?(ye)化??(hua)衛(wèi)??(wei)星??(xing)都??(dou)比??(bi)較??(jiao)多??(duo)了??(le)??，所?(suo)以??(yi)說??(shuo)近??(jin)地??(di)軌?(gui)道??(dao)碎??(sui)片??(pian)防??(fang)護??(hu)和??(he)衛(wèi)??(wei)星?(xing)防??(fang)護??(hu)就??(jiu)越??(yue)來??(lai)越??(yue)重??(zhong)要??(yao)了??(le)??。??。