HG/T 20592  法兰 PL 200(B)-25 Gs10 RF)-S RF-150 RFf b=4��

PL200B-25Gs10 RF)-S RF-150 RFf b=4��

A WN1000-300 RF N=933

WN50-300 RF SCH400 d=110 RF S=15 /9

LJ 2"-150 RF Sch160F0 frf-c-150RF��RF Sch86RF rfF-410RFf0 b=)

bl450(b)-16g RJrf B=189)-4-6.

WN25-63RFthg206b)-63 rf0rf/R

bl50-10RF dhtml259rf