GOST 28884-90

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

Floor parquet products. Massive parquet. Specifications

Sheets out of aluminium and aluminium alloys

Self-tapping countersunk head and sharpening endscrews for metals and plastics. Construction and dimensions

Sewing goods. Assessment of sort

Semiconducting photoelectric detectors and receiving photoelectric devices. Terms and definitions