curtain rail的用法和樣例：
例句
- Each column is equipped in both planes with a preloaded roller bearing guide rail.
每個立柱的兩個平面均配有預載入滾柱軸承導軌。 - The welding carriage is adapted to the rails of various diameters,but each rail is adapted to the certain diameter pipe only.
焊接小車可適應各種直徑的導軌，但每一種導軌只能適應一定的管道管徑範圍。
