heavy haul freight car

• 重载货车

heavy haul freight car的用法和样例：

例句

1. The key technology of the brake locking and release for heavy haul freight cars applied by the retarder has been realized under low pressure transmission.
   解决在低压传动条件下，实现减速器对重载货车的制动锁闭和缓解解锁的关键技术。