勤きん務む中ちゅう

noun, adverb

on duty; at work; while working

Describes being in the state of working, especially during one's shift or working hours. Often used in rules, announcements, or to describe actions done while on the job.

• 勤きん務む中ちゅうは私し用よう電でん話わを控ひかえてください。

  Please refrain from personal calls while on duty.

• 彼かれは勤きん務む中ちゅうに事じ故こに遭あった。

  He had an accident while working.