hold-down spring
常见例句
- A base plate secured to one end of the baseboard supports (1) a pair of swivel-mounted hold-down arms and hold-down pads having swivel-mounted, spring-urged pads;
基地板固定在一个基板支持结束（1）一对旋转式持有，放下武器并按住向下垫有旋转式，弹簧垫要求； 返回 hold-down spring