HG/T 20592  法兰 WN 15(B)-10 RF50fm-RF S=170b S0(b)-16rff21

wn15b-10rf50fm-RF S=170b S0(b)-16rff21

HG/T20592-2009 WN250(B)-63 M

LWN50-150 RF SCH40

wn200(b)-16 rf s=8

WN 32(B)-100 RF S=7/00-2520mpa

PL 80(B)-40 RFch40ss5F0rfsc1a

BL6"-300 M

LWN 25-150 FF-300

PL20(A)-6 RF b=3F DN1550 rf R=100RF36A5)er.0t