GOST 15150-1969 Machines, instruments and other industrial products. Modifications for different climatic regions. Categories, operating, storage and transportation conditions as to environment climatic aspects influence
GOST 2283-1979 Cold-rolled tool and spring steel strip. Specifications
GOST 23360-1978 Basic norms of interchangeability. Keys couplings with prismatic Keys. Keys dimensions and Keyways sections. Limits and fits