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JB/T 8559-1997 This standard adopts the gasket size tolerance requirements in API 601-1985 "Metal gaskets for raised face pipe fla
JB/T 8558-1997 This standard, together with JB/T 6626-93 "Polytetrafluoroethylene braided packing", JB/T 6627-93 "Carbon (chemical
JB/T 8557-1997 JB/T 8557-1997 Flexible Coupling Balance Classification JB/T8557-1997 Standard download decompression password: www
JB/T 8556-1998 This standard is formulated with reference to NF-22-614-81 "Technical data required for coupling selection". This s
JB/T 8555-1997 JB/T 8555-1997 Method of indicating heat treatment technical requirements on part drawings JB/T8555-1997 Standard d
JB/T 8554-1997 This standard specifies the test method for determining the diamond indenter scratch resistance of the interface be
JB/T 8552-1997 This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportat
This standard specifies the type, basic parameters and dimensions, technical requirements, test methods and inspection rules and m