GB/T 12459  弯头 DN 80-890ESf /u06RF0622150 R00 MR

DN 80-8 90ESf /u06RF0622150 R00 MR

bl500(b)-10 rf

SO 2"-300 RF

wn350-63rfs=7mm16/3u6/f4

HG/T20615-2009 WN400-150RF B=3714224012 R

WN 250(B)-16 RF S=7

HG/T20623-2009 法兰 WN800B-300 RF B

IF 250-900 M

WN 100-150 RF S=4

WN550-150 RFRRFde0.5 Rp2.