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1. A low velocity fog applicator is retained in an all-purpose nozzle by a bayonet joint. The applicator is prevented from rotating in the joint by __________.


2. The all-purpose, or combination nozzle is capable by itself of producing a solid stream of water __________.


3. Low velocity water fog is used in firefighting as a __________.


4. An extinguishing agent which effectively cools, dilutes combustible vapors and provides a heat and smoke screen is __________.


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