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Heavy duty measuring unit, twin wheel, stay rod mounted.
重型计量单位，双方向盘，住宿杆安装。
youdao
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Established a method to design rod string of heavy oil directional Wells.
建立了一套适合于稠油定向井的杆管柱设计方法。
youdao
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Established a method to design rod string of heavy oil directional Wells.
建立了一套适合于稠油定向井的杆管柱设计方法。
youdao