draw-in rod 内拉杆
The engagement portion can be locked in one of a plurality of incrementally spaced rotational positions to adjust the axial position of the draw rod to a desired position.
社会参与的部分可以被锁定在一个旋转位置间隔逐步多元化一调整杆的轴向位置绘制到一个理想的位置。
In mountains area, we can use direct graphic method to calculate and draw the graph for protection area of lightning rod.
在山坡地区，避雷针保护范围计算及作图，也可应用避雷针保护的直接作图法。
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