Acoustics. Determination of sound power levels and sound energy levels of noise sources using sound pressure. Engineering/survey methods for use in situ in a reverberant environment— 52 стр.
Safety of machinery. Safety requirements for hydraulically powered open die hot forging presses for the forging of steel and non-ferrous metals— 46 стр.
Acoustics. Determination of sound power levels and sound energy levels of noise sources using sound pressure. Engineering/survey methods for use in situ in a reverberant environment— 52 стр.