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 beam does not spread out appreciably, even at large distance from the source.
它的光束，即使离光源极远，也不显著扩散。
The beam does not spread out appreciably, even at large distance from the source.
它的光束，即使离光源极远，也不显著扩散。
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