【机械工程】双动式触发装置、轻武器【物理】双重作动触发机构

straight-side 4-point double-action drawing press

double-action black japanned spring hinge

double-action clutch【车辆】 机;dual-stage clutch【车辆】 机

double-action hydraulic press

double-action skull forceps

double-action hammer【机】

double-action engine

double-action hydraulic drawing press