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取心钻进
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取心钻进
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钻进方法
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coring drilling
取心钻进
采用环形钻头(空心钻头)刻取岩土,让柱状岩心从钻头底部进入岩心管并将其打捞至地表的钻进方法。
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Hokkaido University
holandric inheritance
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holdback carrier
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holden and release device
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holding flowers and fruits in vegetables
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