hold down spring

基本解释

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；
The local agriculture and food authorities hold that seasonal factors are behind the rocketing price. Pork belly sales are brisk between March and September while supplies always slow down in spring.
该国农业食品部认为，五花肉价格暴涨的主要原因是：3-9月是五花肉的畅销期，而春天是猪肉供货量大幅减少的季节。
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