Pointer Length: the distance the beam will project before stopping.
(指针光束长度)：在停止前光束投射的距离。
The distance the beam will project before stopping.
在停止前光束投射的距离。
The position of the last crack is marked before unloading the beam.
标出最后一条裂纹的位置，然后卸去载荷。
The position of the last crack is marked before unloading the beam.
标出最后一条裂纹的位置，然后卸去载荷。
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