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泥?泵的三?拉杆

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Abstract:

?探用泥?泵的拉杆,主要是磨?拉杆中?一段,过去很多拉杆都因此而报?。如果采用三节拉杆便可避免这种毛病。它是?拉杆分成三节制作(?图),磨?后,只需更换中?磨?的一节即

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