提要目的：观察Q -开关红宝石激光治疗面部浅表色素性皮肤病疗效。
Objective: to observe clinical changes in patients with facial epidermal pigmented dermatoses treated with Q-switched Ruby laser.
目的：观察Q -开关红宝石激光选择性治疗面部色素增加性病变的疗效和可能产生的副作用。
Objective To observe clinical changes in patients with facial pigmentation treated with Q-switched Ruby laser.
首次提出了将磁脉冲压缩开关应用于钛宝石激光器中，由磁脉冲压缩开关和闸流管组合作为放电开关。
Magnetic pulse compressor (MPC) with thyratron as discharge switch used in ti: Sapphire laser was put forward for the first time.
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