HG/T 20592  法兰 WN 50-16 RF SCH80rf7.5 h=259D´0=8rfch40s/c16 R=5F

WN50(A)-16 RF SCH80rf7.5 h=259D´0=8rfch40s/c16 R=5F

wn50-300rf hg00m=34/� FF S=4

WN50A-300RF)1 k= l= n= c=F

BI 1600 l=80f B=300-1ichc1F

wn25(b)-25m 3 s=30S

PL250(B)-10 RF S=7h100=12.5

so250-150RF92-200D=2103RF S=5chsampam199F

HP-2 п═р²п╡Б