HG/T 20592  法兰盖 BL 10-10 FF-25 FM Sh4RF6=700-100745

bl10-10ff-25 FM Sh4RF6=700-100745

DN250-PN16 PL/C RF Ⅱ

wn25-600 rf

WN RF 63K 100A Sch10S

BL20-100 G)-10-1Rch40H22-pam

47021 RF450-1.6

BL RF 10K 100A A=58=

BL 40-6 RF

3 FM450-2.50)0-10-150RF2R-1.022061/ RJ1Ro0RF00-165a=78 b=4 rF

WN 50(B)-63 M S=11.0