The type of key projects.Key projects have 3 size.1. The cheeks, large (Retarding Basin) is a pond or lake. Collect rainwater from the area site. The will hold for a period of time before draining into the river. The area to store water, these include dam, reservoir, dam, the field of agriculture, etc. these buildings will have a purpose other characteristics include As for irrigation to fisheries.2. The plutonium medium is smaller than the slow water construction in the basin is often a natural area, such as pus, swamps, canals. And so on.3. The cheeks, small (Regulating Reservoir) is smaller than plutonium could be public, children's playground, parking lot, or the field house. Which connected to the drainage system or the canal.
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