ballastless track的用法和樣例：
例句
- With the Ballastless track technology extensive used, the problem of the track on solid bed damage and rectification is paid more and more attention now.
摘要隨著無碴軌道技術的廣泛運用，整體道床產生的病害及維修問題也越來越引起重視。 - Successful development of the crane solves the problems of high-speed railways' unballasted track laying and brings obvious economic and social benefits.
博格板大懸臂門式起重機的研製成功解決了高速鐵路無碴軌道板的鋪設難題，創造了明顯的經濟和社會效益。
