built spar
... 组合艏柱 plated stem 组合杆柱 built spar 钢管混凝土组合异形柱 TCFT ...
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为抽油杆柱组合、扶正器、防脱器安放位置及数量设计提供了更加合理、完善的理论依据。
It provides a reasonably and completely theoretical basis for combination of rods, centralizer, assembling site and number of depart device.
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建立下泵深度和抽油杆柱组合优化设计模型。
The optimal design model of downhole pump depth and rod string assemblage is set up.
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