... 轨道车 track car 三开道岔 three-throw turnout;symmetrical three throw turnout;three-way turnout 铁路货物运输竖曲线 vertical curve ...
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symmetrical three throw turnout 三开道岔
three-throw turnout of contrary flexures 寻向三开道岔
three-throw turnout of similar flexures 同向三开道岔
symmetricnos three throw turnout 三开道岔
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