短语词组短语ball guide screw drive 滚珠丝杠传动ball -screw drive mechanism 滚珠丝杠进给系统Ball screw drive structural drawing 滚珠丝杠传动结构图High precision ball screw drive 进口高精度滚珠丝杆传动Ball screw for table drive 工作台传动滚珠螺杆 返回 ball screw drive