This Standard specifies the subgrade dynamic stress test objectives, test principle and test points burying, test equipment requirements, sensor calibration and

This Standard specifies type sizes, technical conditions and marks of hexagon nuts, style 2.

This standard specifies the terms and definitions, types and basic parameters, technical requirements, test methods, inspection rules, markings, packaging, tran

This Standard specifies the type and dimension, technical conditions and markings of slotted pan head screws.

This Part of GB/T 6172 specifies the type and dimension, technical conditions and markings of prevailing torque type hexagon thin nuts (with non-metallic insert