短语词组短语cross screw crank 横向螺旋摇柄cross slider crank chain 交叉滑块曲柄连杆机构cross shaft crank 横轴曲柄cross feed screw crank 横向进刀螺杆曲柄cross -slider crank chail 翻译locking crank cross bar 锁合横杆 返回 cross crank