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2. the period of action.Research and development environment, the premium had occurred after his Majesty the King with speeches about waste and wastewater problems in phetchaburi province, community impacts, the phetchaburi River. Downstream communities, specifically the district to Laem phak BIA, Amphoe ban Laem phetchaburi province. When your research studies, 2533 September 12 begins by dividing distance education research and development into four phases as follows:2.1 stage 1:2533 (1990)-2536 (1993) Experimental feasibility study on waste disposal 2.2 phase 2 2537 (1994)-2539 (1996) To find the practical trials. Practical trials. 2.3 stage 3:2540 (1997)-2542 (1999) The performance and modelling wastewater treatment systems and waste disposal. 2.4 stage 4 2543 (2000) To the present day. To promote dissemination of technology research and development project on environmental and other area in the country.
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