Ball Hinge 球铰链

ball-hinge supporting 球铰支撑

iron hinge with ball bearing 铁滚珠轴承铰链

offset hinge with ball bearing 滚珠轴承偏置铰链

ball bearing hinge [机] 滚珠轴承铰链

ball-bearing butt hinge 滚珠轴承铰链

ball-and-socket hinge device [车辆] 球铰机构

ball-and-socket hinge style [车辆] 球铰式

ball and socket hinge 球窝关节 ; 球形铰节