GB/T 12459  弯头 DN 400-Sch3090EL

DN 400-Sch30 90EL

WN25(A)-25RF S=5.70 RF=6.026/S=4 6

WN50(B)-2500 Rj sc

WN450B-25FFF Sc1=10r20

LWN 4"-150 RF Sch60��RF==c@f sch..60RF��orF/

wn15(a)-100 fm4050(fm4 rfRFRF140

BL 350-10 RFFhM

BL100-40 FFch13800-0=3000.6RF B=203.1-150 R

PL 1