HG/T 20592  法兰 SO 32-16 RF aa=46 b=450 L=39A)-

so32-16 rf aa=46 b=450 L=39A)-

wn500-150rft=103.2ampampquothg20615 wn35M S=3f sch40=4

BL 200-25 RF���m/d=1015 n=20a902.580-1.0 �S/72.6 Sch40

47023 M550-1.6/

DN400-PN2.5 PL RF Ⅱ

TPB-3

WN 100-150 RF Sch80S/data

BL 100-150 RF/data

PL50B