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This is to certify that your paper entitled «An Algorithm in Element Deletion Process Used inMoving Three Zones Unstructured Grid for Arbitrary Relative Motion of Two Objects» was indexed with 4 pages, in the CIVILICA citation database, code COI:ISME19_047, after evaluation and approval of the referees of the "19th Annual Conference on Mechanical Engineering (ISME2011) held in Birjand 2011.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.