GB/T 12459  弯头 DN 500-Ⅱ-690EL

DN 500-Ⅱ-6 90EL

wn 65(b)-16rf s/data/src

Bl 40-300 RFRRF Sch80S

PL80-10M AA= f

PL100(B)-16 RF5/s

wn25(b)-63fm s

PL 80B-16 RFchRFpa165

bl400-150rf h

wn25-300 m

WN 65(B)-40 G00-1@PL15-105900-150 fmc5912Sf5(b)F@PO03&mpampampamamp0RF h=191ampamp;ampn