laser propagation direction
laser propagation direction
激光传播方向
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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For laser power exceeding the dritical power of self-guiding, self-guiding occurs and laser beam oscillates along the propagation direction.
当激光功率超过产生自导引阈值功率时，激光束斑沿着传输光轴方向振荡。
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