long sleeper 中文意思是什麼
long sleeper
解釋
長時睡眠者-
The short - sleeper and long - lump monolithic roadbed construction technique
短軌枕長軌排整體道床施工技術 -
Research on construction technique of ballastless long - sleeper buried track in tunnel
隧道內長枕埋入式無碴軌道綜合施工技術研究 -
Construction technique for precise controlling and measuring roadbed slab of long sleeper buried type ballastless track
長枕埋入式無碴軌道道床板精確控制測量施工技術
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