HG/T 20592  法兰盖 BL 300(B)-25 FMpam40 S=3.S=F-1022.5Red=60

BL300(B)-25 FMpam40 S=3.S=F-1022.5Red=60

BL250-300 RF S304/2059ni200F0-6

47023 C-M 500-4RFF RF-10JT1.5 M5 d=5323.

so150(b)-150rf f1=1.6=15 n=85-155a=3Fm=6WN100500RFRFRFF/wn80-150r

PL 250(B)-16 RF f1=3 D=403 b=5

WN250(B)-40FM0400pampam3S=1rf20RFFF1F S