GOST R ISO 9921-2013

Occupational safety standards system. Respiratory protective devices. Methods of test and test equipment. Part 4. Determination of gas capacity, internal migration/desorption of gas and combined filters using constant air flow and breakthrough time of filters against carbon monoxide using sinusoidal air flow

Movable retainer rings for wax-pattern dies with min 190 mm dia cylinder matrices. Design and dimensions

Occupational safety standards system. Special knitted underwear. General specifications

Magnesium alloys. Methods for determination of silicon

Peat and products of its processing for agriculture. Methods for determination of ammonia nitrogen

High-efficiency filters and filter media for removing particles in air. Part 4. Test method for determining leakage of filter elements – scan method