HG/T 20592  法兰 WN 200(B)-40 Ts60rymkzehej0SRF S16 RF)

WN 200(B)-40 Ts60rymkzehej0SRF S16 RF)

SO 80(B)-25 RF b=4

WN250-300RF A=273.1bãƒ0S=3.0/F1BL100-10RF5Sc0RFF0

BWN 650-150 RF6 RF)-25 F-5840-25c

DN 90×15-Sch140 RE

DN450-PN10 PL RF Ⅱ

WN 32-16 RF RFampa

47021 fm 600-1.0

WN 12"-300 RF S=22

WN300