Fire extinguishers and fire protection apparatus in the nature of sprinkler systems for fire protection; Fire-extinguishing systems; Fire extinguishers and fire protection apparatus, namely, fire extinguishers; Fire pumps; Measuring, detecting, monitoring and controlling devices for inlet and outlet pressure, namely, pressure measuring apparatus; Flowmeters; Devices for measuring water flows, namely, water flowmeters; waterdriven volumetric proportioner, namely, fire pumps; waterdriven volume...