GB/T 12459  弯头 DN 650-Sch16045E3DCH406RFfM=Ԁ⌠

DN 650-Sch160 45E3DCH406RFfM=Ԁ⌠

nb/t47021 fm400-1.6 s＝6

PL20B)-10 RF0F Sc0B-40RF-28o450-1 nL

wn40-25 rf s=4.2 304=

47023 rf1600-1.0 ÃÅ

WN500-900RJ500- Sch100ctp:/www.hg

BL 40-300 RF -BS/s=12.5 &

pl50-10 rf d=140 c=16

1 RF 400-1.0=12F=1

wn20a