bottom sprag

例句：

1. 1.The car's bottom sprag was damaged in the accident.
   汽车的底板弹簧在事故中受损了。
2. 2.The new tire has a stronger bottom sprag than the old one.
   新轮胎的底板弹簧比旧轮胎更强壮。
3. 3.The engineer checked the bottom sprag to make sure it was functioning properly.
   工程师检查了底板弹簧以确保它正常工作。