[化] 快开人孔 quick-opening manhole: 快开人孔manhole opening: 人孔口; 入孔口quick opening: 快速断开; 快速开启quick-opening: 快开quick opening shock valve: 快开冲击阀; 快速开启冲击阀下载手机词典可随时随地查词查翻译