This standard specifies the classification of cone seal 90° wire braided hose assemblies. JB/T 6142.2-1992 Cone seal 90° wire brai

This standard specifies the classification of cone-sealed steel wire braided hose assemblies. This standard is applicable to cone-

This standard specifies the metallographic inspection method for the carbon content of the carburized surface of heavy-duty intern

This standard specifies the technical requirements and metallographic levels for metallographic structure inspection of carburizin

This standard specifies the quality inspection content, methods and procedures for heavy-duty gears after carburizing, quenching a

This standard specifies the type, structural dimensions, technical requirements, test methods and inspection rules of AMN internal

This standard specifies the metallographic grade of heavy-duty gears after spheroidizing annealing or high-temperature tempering a

This standard specifies the classification, structural type, main dimensions, technical requirements, inspection rules, marking, p