Gas mask, chemical weapons, and World War II | Britannica
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Gas mask, chemical weapons, and World War II | Britannica
The gas mask became a part of modern warfare with the introduction of chemical weapons in World War I. With the growth of total warfare and the targeting of civilians by air forces during World War II, the gas mask became a familiar part of daily life during wartime. In this video, English schoolchildren practice putting on and breathing ...
britannica.com2020年2月24日
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