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竖井口
meaning in Chinese
collar of shaft
eye
pit mouth
shaft mouth
silo opening
Related Words
隧道竖井
竖井盖
竖井井筒
上行竖井
竖井抓岩机
电缆竖井
挖竖井
圆竖井
勘探竖井
竖井挖掘机
竖井开拓
竖井开挖
竖井口出车台
竖井矿
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