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Technology
containing
中心井
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Chinese
English
中心井
centre well
中心集水井
central caisson
井眼中心线
centre of borehole
井眼中心线
center of borehole
井筒中心标定
setting-out shaft centre
井筒中心标定
setting-out shaft center
井筒中心炮眼
sumper
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