HG/T 20592  法兰 PL 20(B)-16 RF b=3120Scl00Fch60@RF@4 Rch44060fFpaF@5

PL20(B)-16 RF b=3120Scl00Fch60@RF@4 Rch44060fFpaF@5

WN 80(B)-16 RF

PL 40(B)-10 RFF B=39�Ⅱ0 RF RF00RJ& 1© R.5 RJ-SFJ-5

SO 100(B)-16 RFch140âF b=2h40�f.6

PL300-6 FF21htb=hF S=33.32h40S6oS=/58F/-300Mh S=

WN 250-40 FF)- K=1274 ff

DN250-PN25 BL