稼働

1. Origins, structure, and basic meaning

• Structure: The written form is 稼働, read かどう. This noun denotes machinery being in operation and combines with an action expression.
• Basic usage: 機械が再び稼働する describes operation resuming after repair, while 装置が同時に稼働する describes several devices running at the same time.

2. Common pitfalls and similar expressions

• Resuming after repair
  • A repaired machine returns from a stopped state to operation. Example: 修理を終えた機械が再び稼働しました。 — The repaired machine resumed operation.
• Simultaneous operation
  • Three devices remain in operation simultaneously in the workshop. Example: 工房では三台の装置が同時に稼働しています。 — Three machines are running simultaneously in the workshop.