Its upper end is drill pipe box or union, the nether end is casing pin. It is a crossover with hollow inside.
它是个上端为钻杆母扣或者由壬，下端为套管公扣，内空心的转换接头。
The upper blade is connected with the lower blade through a pin shaft and a chute.
上叶片与下叶片通过销轴和滑槽连接。
Connection between post, upper rail shall be mounted by taper pin or welding, the specified method refer to the details followed.
立柱与扶手管、杆间采用销钉固定或焊接固定的方式，具体的连接方式见后面的的详细要求。
However, you can pin the Toolbox window into position by clicking the Auto Hide button in the upper right corner of the window.
不过，可以通过单击“工具箱”窗口右上角的“自动隐藏”按钮，将此窗口收回到位。
However, you can pin the Toolbox window into position by clicking the Auto Hide button in the upper right corner of the window.
不过，可以通过单击“工具箱”窗口右上角的“自动隐藏”按钮，将此窗口收回到位。
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