基于现有的无加装或无法加装断相保护器的刀闸电机回路和控制回路,分析了刀闸分合闸过程中存在的隐患,并针对这些隐患提出了改进措......

Objective:To evaluate the curative effect of surgical treatment of vocal cord polyp under self-retaining fibrolaryngosco......