DBB in Commercial could mean:
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Similar to DBB
4WP - Series 4 Worm gear Power winch4WP - Type 4 Water-Proof camera
4WT-B - Four Wire, Base mounted smoke detector with Thermal Detector
4WW - Four-Wheel Wagon
4WW - Water Wiggler Water Agitator, model 4
4WW - Four-Wheeled Walker
95 - version 4.0 of Microsoft Windows
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