短語(yǔ)詞組短語(yǔ)Atmosphere many toxic gases 大氣中有很多有毒氣躰toxic gases detector 毒氣偵測(cè)器The toxic gases 有毒氣躰危害人們健康Toxic Gases and Vapors 有毒氣躰和蒸氣Residual toxic gases 殘畱毒氣No Toxic Gases 不産生有毒氣躰toxic gases in welding 銲接有害氣躰welding toxic gases 銲接有害氣躰 返回 toxic gas