HG/T 20592  法兰盖 BL 250(B)-25 RFIIb)-25rfâ¼1 D=M=3f/78-147f

BL250(B)-25RFIIb)-25rfâ¼1 D=M=3f/78-147f

SO50(B)-900 RF/70-16m-600M2.)-16D=355 H1=

SO100-150 RFRFFM S=10-150 RFG/206151=78 Sch80SCH60Sc

PL150B)-16 FFSch80SCH60Sch8000-1M1.0160oH.F.0/1 f1=1

WN300(B)-160 FM S=18 C=880615 WN450-

BⅠ 1600-CHR.16RF0-30