HG/T 20592  法兰盖 BL 450-6 FF RF t=

BL450-6 FF RF t=

WN40-25 RF

SO250(A)-16FFRF833.542012Sjjournal_source=chath0-20S

BL 20-16 FF0-16RFFfm6=Sch40F10 RRF S

JWN 100×150(B)-16 RF S=3.5=8 R00r-

WN 150(B)-40 RF C=30 H

BL100-16 RF Sch40RF/2.

SO600(B)-16 RF5/18.5-B-5rf s=12Cml2803/data

BSO400