GB/T 12459  同心异径管 DN 50×25-6RC�u0083/public/blue/public/common

20592 wn20b-40 rf s=11PSSch40S/t4.0/mpam

WN250-150 RF wn350- REFF Sch406 Rf

wn100-40rf-2.5)-1658)-.00-11h4005/f/-/F-Fothg D00/013-15

2 CFM 400-1.020δ1=0

PL80(B)-6 RF=18f1-115c-s/

WN50-600 RJerse

WN 125(B)-40 FM S=5

LWN25-150 RF B=27 H=158

WN 3"