短語詞組短語Atmosphere many toxic gases 大氣中有很多有毒氣體toxic gases detector 毒氣偵測器The toxic gases 有毒氣體危害人們健康Toxic Gases and Vapors 有毒氣體和蒸氣Residual toxic gases 殘留毒氣No Toxic Gases 不產(chǎn)生有毒氣體toxic gases in welding 焊接有害氣體welding toxic gases 焊接有害氣體 返回 toxic gas