Keywords:
Compressed gas equipment, Compressed gases, Connecting threads, Connection valves, Connections, Fittings, Gas cylinders, Gas holders, Gas pressure vessels, Gas type, Gas valves, Gases, Metallic materials, Mobile, Parallel threads, Screw threads, Screwed connections, Screwed joints, Specification (approval), Taper threads, Testing, Thread-connections, Threads, Valve for steel cylinders, Valve threads, Valves