شنغهاي ختم النفط المحدودة.
جودة عالية، وأفضل خدمة وسعر معقول.
شروط الدفع والشحن:
GOST 5762 Cast Steel Resilient Seated Gate Valve for Water Gas Oil GOST 3706-93 Descrition: Gate valves normally have flanged ends which are drilled according to pipeline compatible flange dimensional standards. Gate valves are typically constructed from cast iron, ductile iron, cast carbon steel, gun metal, stainless steel, alloy steels, and forged steels. Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of