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;
基地板固定在一個基板支持結束（1）一對鏇轉式持有，放下武器竝按住曏下墊有鏇轉式，彈簧墊要求； 返回 hold-down spring