GB/T 12459  弯头 DN 350-Ⅱ-290EL=4-1 B=

DN 350-Ⅱ-2 90EL=4-1 B=

LWN 50-300 RF0-16Sch10S600-0-1.6/0R=lRRF0/

BL40-160FM0/3WchJ13F0-25

WN25(B)-63 Th6c-Sch�

SO 450(B)-10 RFcroppe/p

WN100(B)-16 RF S=6-0R40 Hch4000-15068010316rfF-/2

wn200-900 rfะ

so500-10 RF56/L150-

47023fm1200-1.6Ã

pl125