sector shutter

光电词汇港台地区译法(S) - 飞达光学网 ... sector shaft 扇形齿轮轴 sector shutter 扇形快门 sectorial wave 扇形 ...

直角三角形_馆档网 ... "扇形小齿轮"," sector pinion" "多业快门"," sector shutter" "扇形齿轮"," sector wheel" ...