常见例句双语例句The hook was clamped by two screw nuts on the screw, and these makes up of the retractor finally.不锈钢丝拉钩经两个螺母夹持固定在磁力底座的螺栓上，组成简易的磁力底座拉钩；d.wanfangdata.com.cn 返回 hook retractor