No. 13 couplers often occur failures such as coupler body and yoke cracks, coupler knuckle fracture etc. during operation.These seriously affect normal operation of the railway vehicles.

• 摘要13号车钩在运用过程中经常出现钩体裂纹、钩尾框裂纹和钩舌折断等故障，严重影响列车的正常运行。