Specification for low-voltage switchgear and controlgear. Control circuit devices and switching elements. Electromechanical control circuit devices— 94 стр.
Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering method in an essentially free field over a reflecting plane— 40 стр.
Tractors and machinery for agriculture and forestry -- Guards for power take-off (PTO) drive-shafts -- Strength and wear tests and acceptance criteria— 30 стр.
Acoustics - Recommended practice for the design of low-noise machinery and equipment - Part 2: Introduction to the physics of low-noise design— 50 стр.