GB/T 12459  弯头 DN 300-Ⅱ-690EL105F5 RJrf50=4750 RFF Sch40SR

DN 300-Ⅱ-6 90EL105F5 RJrf50=4750 RFF Sch40SR

WN80-16 RF S=6

DN50-PN40 PL FF Ⅱ

LWN20-300RF SCH40 H=250

1 M 550-0.6 δs=10

WN 450-300 RF S=45RF.16p

WN 300(B)-100 RF S=6

PL 500(B)-16 FF b=3-1.0241.5l156RFch40Jrf”217.5 RJj@5c2@RF521-uОҙ0�

WN 20