防毒面具的滤毒罐，用途是阻绝微粒(例如炭疽菌)、化学药剂(例如神经毒气)以及细菌(例如天花)。
A mask's filter canister is intended to stop particles such as anthrax, chemicals such as nerve gas, and germs such as smallpox.
滤毒罐防毒面具的一部分，含有过滤装置，能将有毒成分从空气中除去。
The part of a gas mask that contains the filter for removing toxic agents from the air.
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