turnout curve behind frog 道岔随附曲线
unsymmetrical double curve turnout 偏开道岔 ; 单式不对称道岔
curve of turnout 导曲线
curve following turnout branch line 道岔附带曲线
Second curve of turnout 道岔附曲线
double curve turnout 双开道岔
symmetrical double curve turnout 单式对称道岔
curve of turnout lead curve 导曲线
curve incident to turnout 道岔附带曲线
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