你知道吗,防毒面具滤毒罐内装有活性碳和滤烟层,人戴上面具吸气时,上述装填物就要产生一定的阻力,若呼吸不得法,如呼吸频率高、速度快,就会增大吸气时的阻力(如一扇门进出人多比人少时拥挤一样),使人呼吸困难,心跳加快,易疲劳。在敌人原子、化学袭击下执行任务,离不开防毒面具,有时为了战斗任务的需要,戴面具作业时间长,劳动强度大。为了适应这种情 You know, gas mask canister with activated carbon and filter smoke layer, people wear a mask when inhaling, the above-mentioned stuffing will have some resistance, if not breathing law, such as high respiratory rate, fast, it Will increase the resistance when breathing (such as a door out of people more than when people crowded the same), people breathing difficulties, rapid heartbeat, fatigue. Performing tasks under enemy atomic and chemical attacks is inseparable from the use of gas masks, and sometimes for the sake of combat missions, masks are worn for a long time and are labor-intensive. In order to adapt to this situation