纤维光束内窥镜用调焦轮的英文

focusing ring for fiberscope

• 纤维:    fibre; staple; fil ...
• 光束:    light beam a surna ...
• 内窥镜:    endoscope
• 用:    40分钟跑完全程 run the c ...
• 调焦:    focus; focusing