直泄面板的每一步提供了优越的通风。
Direct-Vent panels provide superior ventilation with every step.
“一步”低压注浆充填壁后散体状碎石充填层，堵塞浅部围岩泄压通道；
Step one is to grout with low grouting pressure to fill the gravel pack interval and blocked the channels which relieves the grouting pressure in the shallow surrounding rock.
杨利伟进一步解释说：“我们的很多物品在上天前都是有大气压封到里面，随着在太空中飞行，可能会泄压也会有一些声音发出，这样的话需要我们去辨认，我想这些都是很正常的事情。”
He said air leaking out of the objects in the capsule could also cause noise. "I think it is normal," Yang said. "it is necessary to carefully identify the cause."
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