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Toextinguish(熄灭)differentkindsoffires,severaltypesoffir...
问题详情:Toextinguish(熄灭)differentkindsoffires,severaltypesoffireextinguishershavebeeninvented.Theymustbereadyforimmediateusewhenfirebreaksout.Mostportable(手提式的)kindsoperateforlessthanaminute,sot...