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• 18:29, 18 March 2014 (diff | hist) User:74in5y4p ‎ (→only 13. "It is compared with the previous data: new section) (top)
• 17:10, 18 March 2014 (diff | hist) User:74in5y4p ‎ (→the effluent COD concentration increased significantly: new section)
• 13:05, 18 March 2014 (diff | hist) N User:74in5y4p ‎ (three is to be more practical for the people)