[国外标准] AWWA C115A21.15-2005 Flanged Ductile-Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges
[国外标准] SAE J58-1998 FLANGED 12-POINT SCREWS
[国外标准] SAE J518-1993 HYDRAULIC FLANGED TUBE, PIPE,AND HOSE CONNECTIONS,FOUR-BOLT SPLIT FLANGE TYPE
[国外标准] JIS B1452-1991 Flexible flanged shaft couplings
[国外标准] JIS B1451-1991 Rigid flanged shaft couplings