HG/T 20592  法兰 SO 500-16 RF6pampnbspæ&a

21517 SO500-16RF6pampnbspæ&a

WN80-25 RF Sc/K=127H1=7 RF40 n=1mpu

WN25(b)-16 rfh160/0.06L=2frfsS15RF

PL200(B)-16 RF什么�„N65(B)-25RF206/91

WN200-150 RF S=10

47023 M550-1.6/0m800-0.6/6/65-126

HG/T20615 WN80-300RF S

SO 65(A)-16 RFJ-24-150-2

47023