Description: Indicates what the customs tariff number is intended for (e.g. import or export); Name: Use of the customs tariff number
Description: Indicates what the tariff number is for (for example, import or export); Name: Use of customs tariff number
Description: through a surface, product of the sound pressure, p, and the component of the particle velocity, un, at a point on the surface in the direction normal to the surface, integrated over that surface; Name: sound power