图三所示的的悬臂支架可能会很有帮助。
A cantilever bracket shown in Fig. 3-1 might be quite helpful.
两个悬臂则固定在支架的内部结构上,并允许管架从贮存位置降到钻柱中线上。
The swing arms are fastened to the inside structure of the mast, and permit the pipe rack to be low-ered from the stored position to the centerline of the drill string.
两个悬臂则固定在支架的内部结构上,并允许管架从贮存位置降到钻柱中线上。
The swing arms are fastened to the inside structure of the mast, and permit the pipe rack to be low-ered from the stored position to the centerline of the drill string.
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