Having completed calculation of top drive counter-torque and mast mechanics analysis, an upgrading proposal has been put forward.
完成了安装顶驱后反扭矩的计算和井架力学分析，并提出了井架结构的改造方案。
Having completed calculation of top drive counter-torque and mast mechanics analysis, an upgrading proposal has been put forward.
完成了安装顶驱后反扭矩的计算和井架力学分析，并提出了井架结构的改造方案。
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