Damaged leaf springs for Hong Yan model CQ30290 dumper are able to be reme-died by welding,but should prevent from bot cracks,it is reported by the authors in this paper.

• 认为对于损坏了的CQ30290型红岩自卸汽车的钢板弹簧可用焊接方法修复，但应防止热裂纹的产生。