railway subgrade的用法和樣例：
例句
- Repair of the railway roadbed is in Sukhumi to Ozzie Muqi La carried out by the railway line.
修復鐵路路基的工作是在蘇呼米至奧齊姆奇拉鐵路線(xiàn)上開(kāi)展的。 - The harmony of it, the tracker superstructure, the tunnel and bridge structures is the one of the key problems in the railway modernization.
隨著(zhù)高速鐵路和快速客貨混運技術(shù)的發(fā)展人們意識到提高鐵路路基壓實(shí)標準，使之與線(xiàn)路上部結構和橋隧建筑物的標準相協(xié)調是鐵路現代化的關(guān)鍵問(wèn)題之一。
