HG/T 20592  法兰 WN 50(B)-100 RF98/RF Sch80M S=280-4m Sch40chF S=3

WN 80-150 RF SCH80414606mrf

PL600-40RF(B)f-1RFR

SO 500-10fm-6RF B=880 rf s=5sc0ch4h40SME

lwn25-300 rf h=2162 P.8FF1=3 s8f 10FS=4S=91048 h=80rj&am

wn50b-100RF98/RF Sch80M S=280-4m Sch40chF S=3

WN 80(B)-16 RF S=46 RF525

20592 PL300-25RF6 MFRRF11=10mpa