GB/T 12459  弯头 DN 50-5.5490ES

DN 50-5.54 90ES

WN 20-150 RF Sch80S005f s62TGÅ44F

WN80-63RF S=10/100RF0)

LWN2"-600 RF B=5

WN40-300 RF S=5fpF-700.067021045/31c-060 r

SW15-300 RF Sch40¢306 RF0R

WN65-100G25 rf s

BL 25-40 RF C=10.6 b=0Mmpa

WN20(B)-100RFOfsch40s-216 RF6b=

PL15