GOST 29093-91

Mining. Mine ventilation. Terms and definitions

Soils. Laboratory methods for the determination of a filtration factor

Anodic earthing of the electrochemical protective installations against corrosion of underground metal constructions. Methods for determining the biocorrosion aggressiveness of soils and their impact on underground metal constructions

Alloys and foundry alloys of rare metals. Method for the determination of tantalum

Systems of data transmission. Circuits and exchange parameters at the interface C3 in parallel input-output of discrete information

Hardeners for epoxide resins. Determination of primary, secondary and tertiary amine group nitrogen content