One challenge is that laser light cannot penetrate the skin very deeply.
其中一个挑战是激光无法深入人的皮肤。
Objective: To observe the curative effect of He-Ne laser in the treatment of skin infection.
目的：观察氦氖激光照射治疗皮肤感染的疗效。
Wuhan veterans laser tattoo — in light of the name, let your skin reborn!
武汉老兵激光纹身——以光的名义，让你的肌肤再度重生！
Wuhan veterans laser tattoo — in light of the name, let your skin reborn!
武汉老兵激光纹身——以光的名义，让你的肌肤再度重生！
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