parallel crank four bar linkage 平行四杆回转链系
parallel-crank-four-bar linkage 平行曲柄四连杆组
four-bar linkage parallel crank 平行曲柄四连杆组
non-parallel crank four bar linkage 不平行四杆回转链系
parallel four-bar linkage 平行四杆机构
anti-parallel four-bar linkage 逆平行四连杆
complex parallel four-bar linkage 复合平行四杆机构
应用推荐