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取心钻头
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取心钻头
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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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Seven History Books on the Southern and Northern Dynasties
seven holes probe
Seven Honours Event
seven initial categories
Seven Interpretive Essays on Peruvian Reality
seven keys of gongche system
seven kinds of education
Seven Laws
seven liberal arts
seven libraries of complete collection of four treasuries
Seven Library Catalogs
seven little fortunes
seven-lobed yam rhizome
Seven Luminaries
seven lurnbosacral vertebrate
seven major economic divisions in China
seven masters of Jian’an period
seven meditations on the truths
Seven Morality
Seven Noble Families of the State Zheng
Seven Oaks Incident
seven orifices
seven-part syllogism
Seven Party Mujahideen Alliance
Seven Pennies and Other Short Stories
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