special heavy section switch rail,tongue rail made of special section rail,full-web section switch rail
special heavy section switch rail,tongue rail made of special section rail,full-web section switch rail
[铁道科技英汉词典]
special heavy section switch rail,tongue rail made of special section rail,full-web section switch rail特种断面尖轨
是什么意思，special heavy section switch rail,tongue rail made of special section rail,full-web section switch rail的解释，special heavy section switch rail,tongue rail made of special section rail,full-web section switch rail的翻译