爱词霸英语   汉语   手机版   软件版下载 | English
每日一句:正在加载...
1.a threaded hexagonal or square-headed bolt with a nut; tightened with a wrench; used to connect metal parts.
一种带有螺母的六角形或圆头螺纹螺丝；用扳手拉紧；用于连接金属。收藏指正
尝试查询