标准轨

標準軌
biāozhǔnguǐ
  1. (rail transport) standard gauge
  2. standard gauge

Wiktionary

Entry Composition

1 标准 biāozhǔn
  1. standard; norm; criterion
  2. (adjective) standard
  3. good; correct; conforming to a standard
2 轨 guǐ (bound form) rail; track; course; path