Koraput Child Innovates to Use Corn Cobs as Water Purifier
Four pages

出版日期 10 July 2015 / “教育, 教育” / 语言—English / 4页

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The Innovation by lalita Prasida Sripada Srisai , a student of Std.IX in Delhi Public School , Damanjodi , koraput District 更多

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标签: corn · water · child · pollution · purification · dps · koraput

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