単たん一いつ

na-adjective, noun which may take the genitive case particle 'no', noun

single; sole; unitary

Describes something that is not multiple, composite, or divided; often used in technical or formal contexts for 'single' or 'unitary'.

• この制せい度どは単たん一いつの基き準じゅんで運うん用ようされている。

  This system is operated under a single standard.