M40, Gas Mask and Respirator Wiki
Par un écrivain mystérieux
Description
The M40 series Field Protective Masks were used by the US Army, US Marine Corps, and selectively by the US Navy. . The masks were developed and introduced as a replacement to the M17 series protective mask that had been in service since 1959. The M17 introduced a number of innovative features absent on the previous service masks, such as a voice diaphragm and a drinking system. However, the M17 series had a number of shortcomings: The M17 series M13 filters were difficult and time-consuming to c
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depuis
par adulte (le prix varie selon la taille du groupe)
