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反循环钻进
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反循环钻进
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everse circulation drilling
反循环钻进
冲洗液介质自孔口经钻杆与孔壁间或双壁钻杆的内外管之间的环状空间流向孔底,经钻杆或双壁钻杆内腔上返到地表的钻探循环方式。
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non-rotating white dwarf
nonrotation
non-rotational flow
non-saddle set
non sampling error
non-sampling error
nonsampling error
non-satisfiability
non-satisfiable formula
non-scalar matrix
non scaling fractal
non-scaling fractal
nonscaling fractal
non-scheduled services
non-secant half-line
non-selective absorption
nonselective cyclooxygenase inhibitor
non-selective emission
non-selective radiation
non-self-adjoint
non self adjoint algebra
non self-adjoint algebra
non-self-adjoint algebra
nonself adjoint algebra
non-self-adjoint operator
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