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my answer is that 9mm nozzle will be max because 9mm take more disperse pressure
This fire fighting i dont know about it only fire alarm im sorry
oxygen Flammable substance Ignition source
Fire triangle is the combination of three elements, 1. Fuel 2. Oxygen 3. Heat Eliminate any one of these key element fire wouldn't be occurred at point.
There are many method to put them down like using the foam but with many .technical skill and by Professional staff
Fire Triangle consists of Fuel, Heat & Oxygen.