HG/T 20592  法兰 WN 350(B)-40 RF S=7592s=1=470R10

WN 350(B)-40 RF S=7592s=1=470R10

so20b-10tA)-10 RF h=72 δ1=10150 rf sch4080sSCH8035-05 SCH20R.5mpam63 rf(s=3)=3 L=23 C10/)-

WN25-600 RF Sch105-400=212cRF ScF H WN400-6

bl500-25 mfmth5r0 RJ S=4250s=4S=1H80S

WN40(B)-16 RF S=≥3.58δ=700FFso500

DN