Projection of still pictures and motion-pictures - Part 3: Minimum dimensions for elements, width of lines, dimensions of lettering and graphical symbols in originals for projection— 20 стр.
Heating plants for district heating - Part 1: Safety requirements for domestic substations, stations and domestic systems to be connected to hot-water district heating networks— 35 стр.
Slide projectors and slides -Slides with scientific and technical content - Original drawings and slides, production, testing, projection conditions— 9 стр.
Slide projectors and slides -Slides with scientific and technical content - Original drawings and slides, production, testing, projection conditions— 9 стр.