This standard specifies the terms and definitions, design, manufacture and inspection, testing, marking, packaging and storage of power extraction couplings (hereinafter referred to as couplings). This standard applies to power extraction couplings, and other couplings can also be implemented as a reference.
GB/T 38601-2020 Referenced Document
GB/T 1031 Geometrical Product Specifications(GPS).Surface texture:Profile method.Surface roughness parameters and their values