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.
纳税人以委托方式出口货物的，应当按照国务院税务主管部门的规定办理委托代理出口手续，由委托方按规定申报办理出口退（免）税、免征增值税或者缴纳增值税；未办理委托代理出口手续的，由出口货物的发货人按规定申报缴纳增值税。
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