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钻探环境保护
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coring bit
取心钻头
以超硬材料作为切削刃,在回转钻进中通过切削岩石以采取圆柱状岩心的钻头。
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Baifoshan grottoes
Baifuquan Water Diversion Project
Baigu and Gaolingpo Site
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Baiguishan Reservoir
Bai Guoying
baihao yinzhen tea
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Bai He Film Company
baihe gujin decoction
Baiheliang Inscriptions and Carvings
Baiheliang inscription site protection project
Baihe nature reserve
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Baihualou Collection, Continuation, and Recitation
baihuanshu
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BaiHua Zhou
baihu decoction
Baihu General Sense
baihui
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