分岔附帶曲線 turnout curve: 道岔曲度curve of turnout lead curve: 導曲線turnout curve behind frog: 道岔隨附曲線unsymmetrical double curve turnout: 偏開道岔curve following turnout branch line: 道岔附帶曲線下載手機詞典可隨時隨地查詞查翻譯