Toextinguish(熄滅)differentkindsoffires,severaltypesoffir...
2019-10-01
問題詳情:Toextinguish(熄滅)differentkindsoffires,severaltypesoffireextinguishershavebeeninvented.Theymustbereadyforimmediateusewhenfirebreaksout.Mostportable(手提式的)kindsoperateforlessthanaminute,sot...