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
240 صفحه
ASME B16.5-2013- Pipe Flanges and Flanged Fittings استاندار