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FIXING MECHANISM OF DETACHABLE CORE-TAKER
FIXING MECHANISM OF DETACHABLE CORE-TAKER
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机译:可拆卸核心经纪人的固定机制
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摘要
the invention относитс to the case and is дл бурени core selection and extraction through a column of drilling pipes. the preservation of a removable керноприемника (kp) of the deformation of the e
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