HG/T 20592  法兰 PJ/RJ 0-2.5 RF000 rh41

DN 500-6 TSL RF ⅡF S=4-6 RF..5 RJ0-2.5rf000 rh41

SO 80-300 RF0RFRF b=4-16 RF r2352.5 FF6mpam

HG/T20615 WN125-150RF550-f/â�

BL250(A)-10RFF50-PL RF Ⅱc80S�rFFmpa1217.5 RJj@5c2@RF@��RFRF8@R0 RF120.0S6a(@RF.3=18)-255

WN 65-2500RF/rf c

WN200-4