A.拔出保險(xiǎn)栓→壓下壓把→對(duì)準(zhǔn)火焰根部滅火 B.壓下壓把→拔出保險(xiǎn)栓→對(duì)準(zhǔn)火焰根部滅火 C.拔出保險(xiǎn)栓→對(duì)準(zhǔn)火焰根部滅火→壓下壓把 D.壓下壓把→對(duì)準(zhǔn)火焰根部滅火→拔出保險(xiǎn)栓