The canister USES a fan to force air through the filter, and then the purified air runs through a hose to the mask.
罐中的风扇使空气流过过滤器，这样净化的空气通过软管达到面具。
Again, use the Vanishing Point Filter, Warp and a Transparency Mask to create the next section.
在下一个阶段中再次使用消失点滤镜、变形和透明蒙版。
Impossibly, he clearly took an anti-virus mask, basically can filter the poisonous gas of overwhelming majority.
不可能，他明明带着防毒面具了，基本上能够过滤掉绝大部分的毒气。
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