Russian standards PDF
Underground utilities. Determination of location and depth with nondestructive methods
Document status: Active
Hard-metals bits for core exploratory drilling in medium hard. Specifications
Document status: Active
Butadienemethylstyrene synthetic rubber CKMC-30APKM-15 and butadiene-styrene rubber CKC-30APKM-15. Specifications
Document status: Replaced by GOST 11138-2019
