基本解释[機械工程]精制螺帽词组短语短語half -bright nut 半精致螺母;半精制螺帽semi -bright nut 半光制螺母semi bright nut 半光制螺母half bright nut 半精制螺帽Bright Mild Steel Hexagonal Nut 光亮軟鋼六角螺絲帽bright nut更多词组专业释义機械工程精制螺帽