Acoustics -- Determination of sound power levels of noise sources using sound pressure -- Survey method using an enveloping measurement surface over a reflecting plane
No Vigente
Idioma: Inglés
Formato: Visualización con Impresión
$271.320
Rubber and plastics hoses -- Exposure to a xenon arc lamp -- Determination of changes in colour and appearance
No Vigente
Idioma: Inglés
Formato: Visualización con Impresión
$112.812
Validation of the strength of reference solutions used for measuring concentrations