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A block of bricks placed in the main drainage canal with four holes, from which the net to filter out solid waste was installed. Lothal, Gujarat, India
{{Information |Description=bricks in drainage in Lothal (India) |Source=English Wikipedia, http://en.wikipedia.org/wiki/Image:A003_%28Small%29.jpg |Date=April 13, 2006 |Author=http://en.wikipedia.org/wiki/User:Rama's_Arrow |Permission=the creator of this