Vandens kokybÄ—s standartas. Vandens Å¡altiniai. FiziologinÄ— ir sanitarinÄ— vandens reikÅ¡mÄ—. FizinÄ—s, cheminÄ—s ir biologinÄ—s vandens savybÄ—s. Vandens tiekimo sistemos. Geriamo vandens kokybÄ—s gerinimo bÅ«dai. Gyvulių ir paukÅ¡Äių girdymo higiena. Nutekamieji vandenys ir jų nukenksminimo bÅ«dai. Vandens sanitarinÄ— apsauga.
Water quality standard. Sources of water. Physiological and sanitary importance of water. Physical, chemical, and biological qualities of water. Systems of water supply. Methods for improving drinking water quality. Hygiene for watering beasts and birds. Wastewater and the ways to its sterilization. Sanitary protection of water.
За последен път се одобри от lilian canale - 20 Април 2008 02:23