Electronically Operated Equipment-Namely, Chemical Feeders Used in Industry

FUEL OIL TREATMENT; CHEMICAL ADDITIVES FOR FUEL OIL

WATER TREATMENT METERING SYSTEMS FOR BOILERS ESSENTIALLY COMPRISING METERING PUMPS, DRUM LEVEL CALIBRATED GAUGES AND TIMERS

FEEDWATER PROPORTIONING UNITS FOR WATER BOILERS-NAMELY, WATER METERS, DRUM GAUGES AND METERING PUMPS AND PARTS THEREOF