It can pro vide a better voltage flat by increasement of numbers of helical coil sections a nd branch in parallel.
增加螺线管段数和导线并联分支数，可得到一个比较好的电压平台。
OBJECTIVE to observe the clinical curative effect of Fd-Nd: YAG laser photocoagulation in early treatment of branch occlusion of retinal vein.
前言：目的观察倍频固体激光早期光凝治疗视网膜分支静脉阻塞的疗效。
OBJECTIVE to observe the clinical curative effect of Fd-Nd: YAG laser photocoagulation in early treatment of branch occlusion of retinal vein.
前言：目的观察倍频固体激光早期光凝治疗视网膜分支静脉阻塞的疗效。
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