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If they have time, astronauts and cosmonauts will look to plug the leak or close the hatch to the leaking section of the station. (That is how they dealt with a minor leak in the station’s PrK module for a number of years, and it basically worked.) Remember, though, that this is the worst-case scenario, and our crew will run into a hard deadline. Once pressure falls to around 490 mm Hg, NASA says, critical systems risk breaking down. Astronauts could suffer hypoxia, oxygen deprivation so debilitating they could become delirious. It will be a heart-wrenching call, but if nothing else can be done, the crew will need to go to their crew vehicles and leave the ISS.，详情可参考快连下载安装
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我国也在快速进入这个阶段，这些赛道增长明显：订阅型宠粮和营养品、长期健康管理服务、智能养护与远程陪伴设备；这类产品的共同特征在于，并不追求一次性交易，而是试图建立稳定的服务关系。