The content of this standard includes: the concept and principle of design review, the composition of the review group, the review

This standard specifies the material selection, heat treatment equipment, process and quality control of gas carburizing heat trea

This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, packaging, storage and

This standard specifies the product classification, technical requirements, test methods and inspection rules, marking, packaging,

This standard specifies the basic types of taper sleeves and their structural dimensions, basic parameters and markings. This stan

This standard specifies the design method of circular arc tooth synchronous belt transmission, which is applicable to the design o

This standard specifies the type, tooth size and limit deviation, pulley size and limit deviation, shape and position tolerance an

This standard specifies the type, tooth size, pitch line length, belt width, limit deviation and marking of circular arc tooth syn