flat-bottom rail

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1.	平底轨 E 家论坛 - Powered by Discuz!... ... 68. 安全道岔 safety switch 69. 平底轨 flat-bottom rail 70. 有槽钢轨 grooved rail ... www.5iehome.com
2.	平底轨条 http://ww... ... "平快车,普通快车"," Ordinary express" "平底轨条"," Flat-bottom rail" "平底垫钣"," Flat-bottom tie plate" ... www.guandang.com

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