GB/T 12459  弯头 DN 500-490EL053r015016RF56 FFRj59chRF-16

DN 500-4 90EL053r015016RF56 FFRj59chRF-16

PL100(B)-16 RFh4ch80S=27均�

WN15-16RF Sch40S/FF00f/u0-sch3.b) WN700-300 RFrfF R

SO 1000(B)-25 T/2000f��&0@440F59 b=145 hS=8FFM.

PL80(A)-16RF f1=3 b=3Ff0 RF

WN 80(B)-25RF S=5FMHG/090H90ELM

BWN1000-300RF