4WG means 4-pass Wet-back fire tube Boiler with Gun Burner in
Commercial
Similar to 4WG
ACG - All Condition Gear
ACH - Absorption Chiller Heater
ACID - Amstrad Cartridge Identification Device
ACLD - Active Constrained Layer Damping
ACM - Accumulated Call Meter
ACM - Asbestos Contaminated Material
ACM - Air Conditioning Motor
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