这样可以为中央真空管道提供防护屏以免被压碎或击穿。
This will provide a protective shield around the central vacuum tubing to help prevent it from being crushed or punctured.
减压蒸馏使用带抽气口和防护滴管的接液管，可以防止液体直接泄露到真空泵中。
Vacuum distillation using the dropper with the exhaust port and the access protection tube to prevent leakage of liquid directly into the vacuum pump.
为了生存，吉文人进化出外骨骼，如同真空防护服一样，把自己的身体组织包裹在里面，闭合所有腔孔，进入冬眠状态。
To survive this, the Givin have evolved a means of sealing their entire anatomy in a form of organic exoskeleton vac-suit, sealing off all orifices and entering a state of hibernation.
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