A mask's filter canister is intended to stop particles such as anthrax, chemicals such as nerve gas, and germs such as smallpox.
A mask's filter canister is intended to stop particles such as anthrax, chemicals such as nerve gas, and germs such as smallpox.
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）。