[ Air analysis apparatus; ] calorimeters; [ Geiger counters; ] diagnostic apparatus, not for medical purposes, namely, diagnostic apparatus for testing plumbing systems; electrolysers; [ fire alarms; fire hose; fire hose nozzles; ] fire extinguishing apparatus; flowmeters; heat regulating apparatus, namely, control valves for regulating the flow of gases and liquids; [ hygrometers; intercoms; ] measuring apparatus, namely, thermostats; electric measuring devices, namely, thermotstats; [ photo...

MANUALLY OPERATED METAL VALVES, NAMELY BALL VALVES, RADIATOR VALVES, TOW AND FOUR-WAY VALVES, SAFETY VALVES, GATE VALVES, AND CHECK VALVES