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井下动力钻具
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井下动力钻具
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downhole motor
井下动力钻具
连接在钻铤与钻头之间,随钻柱一起下入井底,驱动钻头旋转破岩的动力机。又称井下马达。
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squarer
square root
square root algorithm
square root inequality
square rooting
square root method
square root operator
square root sign
square root transformation
square scale
square-shaped array
square signal
square sum
square-summable function
Square Theatre
square tiling
square torus
square triangle picking
square-triangle theorem
square triangular number
square TV
square vertebral body
square wave
square-wave modulation
square wave polarography
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更新时间:2026/6/12 23:13:10