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drilling coring
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drilling coring
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钻井取心录井技术
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drilling coring
钻井取心
为了掌握地下地质情况,直接获得真实可靠的地下岩层的有关资料,在钻井过程中用取心工具从地下取出大块岩样(岩心)的作业。
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definite restriction
definite sign
definite S integral
definite S-integral
definite subspace
definite - time
definite time
definition
definitional domain
definitional equivalence
definitional identity
definitionally equal
definitional occurrence
definition by abstraction
definition by cases
definition by extension
definition by induction
definition by mathematical induction
definition by recursion
definition by transfinite induction
definition for China's mega cities
Definition of Art
definition of image
definition of labor relation
definition of meters
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