Читать книгу Standard methods for the examination of water and sewage - Association of Official Agricultural Chemists - Страница 7

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The temperature of the sample, if taken, shall be taken at the time of collection, and shall be expressed preferably in degrees Centigrade, to the nearest degree, or closer if more precise data are required. The thermophone^[109] is recommended for obtaining the temperature of water at various depths below the surface.