HG/T 20592  法兰 PL 300(B)-16 FF-RC s160FF-RFWN Sc@/F0a��3.52@6FF)-406�

PL 300(B)-16 FF-RC s160FF-RFWN Sc@/F0a��3.52@6FF)-406�

PL 80(B)-16 RF)-6 RFRF�� PL

wn125(b)-40mF16516 g@Rh-Sc5FMF

WN200-300 RF ASME16.5

PL200-10 RF B=ch37F

WN 8"-300 RF sc

WN3"-900 RF S=7

LWN50-150 RF H=1648

WN15(B)-100RJh405/

WN