Listening Quiz: Bảo Trì Phòng Ngừa Cho Hệ Thống UPS – Advanced Level

1. What is the conversation mainly about?
2. How often should the UPS be inspected?
3. What does Linda say should be checked during inspections?
4. What can be inferred if UPS maintenance is delayed?
5. Which maintenance task should be done every six months?

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