GB/T 12459  弯头 DN 65-Sch80S90ES δ=5.54

DN 65-Sch80S 90ES δ=5.54

3 RF 550-1.6 B=51R

WN 100(B)-40 RF

DN500/PN10/05A16Tamp;amp0

DN 500×500×8-Sch10 TR×250-Sch80S TR

WN 100(B)-25RF s=6F RF800-6.4RF S=6RF66 s)/ d3

1 RF 450-1.0 δs=8

bl20(B)-10RFrum30

PL200-25 FM

WN600(B)-16RF S=8@92-2..514