circular ventilation shaft圆形: circular; round通风井: air well; by-pit圆形通风栅: circular air grid通风井: air pit; air stack; air well; air-piston; ari shaft; by pit; discharge air shaft; downcast; fan shaft; fang; funnel; vent shaft; ventilating shaft; ventilation shaft; ventshaft【矿物】通风井。: air shaft下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:圆形通风井，即可在微信中查询翻译
