Industrial valves. Marking of metallic valves
Valves, Industrial, Metals, Marking, Fluid equipment, Flanges
استاندارد BS EN 19:2002
Industrial valves. Marking of metallic valves
Valves, Industrial, Metals, Marking, Fluid equipment, Flanges
NFPA 291: 2016-Recommended Practice for Fire Flow Testing and Marking of Hydrants