HG/T 20592  法兰 WN 900(B)-6 G S4B)F=3.5 RF S=3.56@RF@4F A=�JsRF@F

WN 900(B)-6 G S4B)F=3.5 RF S=3.56@RF@4F A=�JsRF@F

WN65(B)-25RFS=5mpa

1 FF 600-0.6 δs=10

WN150-63MF RF0 DN Sch30 HG=

WN45(B)-16RFm 15h40S.@RFSp&@t.0145@B755-R@0000O0@00ch805@cpamp RFï؟ RFS

WN50(B)-25 RF S=9prja818210a s=55h60rf s== B

PL120-6RF1a0