By way of studying thehardness of rail weld after flash welding or thermit welding, it is shown that bainite rail AB1 has higher.是什么意思_By way of studying thehardness of rail weld after flash welding or thermit welding, it is shown that bainite rail AB1 has higher.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句