| 释义 |
AC-4 or AC4 may refer to: - AC4, a hardcore punk band
- AC4 (album), an album by AC4
- Light Wing AC4, an aircraft
- Aviastroitel AC-4 Russia, glider
- Comte AC-4, a two-seat Swiss monoplane
- USS Cyclops (AC-4), a US Navy collier ship
- Southern Pacific class AC-4, a class of steam locomotive
- AC-4, an IEC Utilization Category
- Dolby AC-4, Dolby Digital audio codec
- Shattered Skies, a 2001 video game
- Armored Core 4, a 2006 video game
- Black Flag, a 2013 video game
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