HG/T 20615  法兰盖 BL 20-300 FF C=16

BL 20-300 FF C=16

BI 800

WN 20(B)-10 M

WN 40(B)-16 RF S=4

DN65-PN16 PL FF Ⅰ

WN250-40MFMSc6FM/4/h

SO 80(B)-16 RF700-0.6.256

DN 50-Ⅱ-3 90EL

WN 3"-150 RF Sch40S

WN 80-300 RF Sch80Sf2000-0.6schRFS80m800-1;-300 RF Sch805E3D-16 RFRF101 u-RJFSF46.