sub-thread 子线程
Stop sub-thread 停止线程
Start sub-thread 子线程开始
Resume sub-thread 继续线程
Suspend sub-thread 挂起线程
sub-thread page template 子线索页面模版
According to actual needs. there are circulating sub with casing thread and circulating sub with union thread.
根据需要可分为套管螺纹循环接头和油壬螺纹循环接头(全规格)。
The landing is thread connected with stop ring and tightened on and put into downhole with drill string. The landing sub is used as a sub above drill string before check valve is run in downhole.
就位接头与止动环用螺纹联结并上紧扣和钻柱连接下入井内，在未投入止回阀时作为钻柱上的一个接头。
Taking the conical thread as the object of study, a sub-pixel image detection method for the mechanical part linear edge based on the support vector regression was proposed.
以锥形螺纹为研究对象，提出了一个基于支持向量回归的机械零件直线边缘亚像素图像检测方法。
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