HG/T 20592  法兰盖 BL 500(B)-10 RF b=31=5 B=715 K=900 d

BL500(B)-10 RF b=31=5 B=715 K=900 d

LWN 15-150 RF

wn500-150rf b=48460)-25rf

BL600-600 RF0rff16-6=0p0/50110=12

PL150(a)-6 RF10400=52525o6 t.h300 S=325fm s

SO 25(B)-25 T0-10b)-

PL250-10RFHG/J14h

3 T 1400-0.2520δ0=148=0/16RF -FF=5 6äF.

BL25-150RJFFSc