GOST 27798-2019

Piezoelectric filters. Main parameters

Air-cooled air conditioners and air-to-air heat pumps. Testing and calculating methods for seasonal performance factors. Part 1. Cooling seasonal performance factor

Unified system of standards for instrument-making. Measuring and automation devices. Input and output frequency electric continuous signals

Fertilizers mineral. Method for determination of particle size distribution

Occupational safety standards system. Means for individual protection of breathing organs. Methods of testing all-service canisters protection time against noxious gaseous contaminants

Portable multi-impression press moulds for manufacturing rubber-fabric locking rings. Design and dimensions