HG/T 20592  法兰 PL 600(B)-6 FM)-16r

PL600(B)-6FM)-16r

DN50-Class300 WN RF ScRFH16100-150

WN 80(B)-40 m S=3.5

WN40-600 RF Sch40(b)-16 rfRF Ⅱ5RF2@F45050/F23RFM

wn125(B)-16 m0campampampam05

wn 20-600 rj0 RF5RF R50(b

PL 450(B)-16 RF C=4pam

WN 32-900 M Sch80S0amfH.h��F2RRF B

PL550-10