That has been that way even before 1949.
所有跟帖:
• 但可能是后来要跟“苏修”看齐嘛!苏的轨宽和中国的不一样 -tttw- ♀ (0 bytes) () 12/07/2012 postreply 10:59:36
• 是吗?我还真是不知道!不过老美这个长篇大论的报道实在是太长啦 -参谋总长- ♂ (0 bytes) () 12/07/2012 postreply 10:59:42
• Wide track is better for train's lateral stability in flat lands -Happyyl- ♂ (134 bytes) () 12/07/2012 postreply 11:09:24