GB/T 12459  弯头 DN 20-Ⅱ-4.590ELch4

DN 20-Ⅱ-4.5 90ELch4

PL50-16 RF.0-2.

SW25-150 RF SRFRRhF S46RF/d0

WN 8"-300 RF S=8.38

3 RF 700-1.6FRF3RFRFST-

DN500-PN16 WN RF Ⅱ S=10

WN20B-100FM S=4-1-23ASa7Bë‚Ã2009/ sch82000/urget=0

WN 200-300 RF Sch80S

DN65-PN6 SO RF 6F S=61

A wn750 -