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水文地质井管
释义
水文地质井管
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水文地质钻探
释
hydrogeological well pipe
水文地质井管
保护井壁的套管。有时也泛指套管与滤水管。如全部岩层为坚硬的稳定性岩石时,不需要安装井管,以孔壁当井管使用。又称井壁管。
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trace method
trace minerals in coal
Trace Model of word recognition
trace norm
trace of a commutator
trace of a form
trace of a function
trace of a line
trace of a linear transformation
trace of a mapping
trace of a matrix
trace of an algebraic element
trace of an algebra of sets
trace of an ideal
trace of an operator
trace of a square matrix
trace of a tensor
trace of endomorphism
trace of impurities
trace [of matrix]
trace of matrix
trace of road traffic accident
trace of tensor
trace of von Neumann algebra
trace on a C*-algebra
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