HG/T 20592  法兰 PL 125(B)-6 RF b=2/

PL125(B)-6RF b=2/

WN250(B)-150 RF S=6.0135r

wn25-150 rf sch80sc

WN25(A)-25 RF S=516 M/p SCHSD=

BL150-6 RF h RF4F0-=120.7d==S-150 RF Sch80Srfa=

WN25(A)-25 RF S=5

PL20(B)-25 RF ,HG/T20592ffL=19 SB=634 b=5RF D=1479 K

BL350-150 RF=5

pl25(b)-16ffSc b=

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