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斜井下段井壁
meaning in Chinese
low wall of the hole
Related Words
斜井
斜井卷扬机
斜井箕斗
斜井快车
双轨斜井
斜井开拓
斜井抽油机
斜井井口
暗斜井
钻斜井
斜井完井设计
斜井维修工
斜井形
斜井仰拱
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