cog-wheel coupling 齿形联轴器

braking-wheel coupling 制动轮联轴器

Fifth wheel coupling pins 半挂车牵引座牵引销

With brake wheel coupling 带制动轮联轴器

cog wheel coupling 齿形联轴器

fifth wheel coupling pin 牵引座牵引销

coupling wheel 耦合齿轮

Wheel-rail Coupling 轮轨耦合

back-wheel type coupling 背轮式联轴器

wheel-rail coupling model 轮轨耦合模型