| http://www.w3.org/ns/prov#value | - International Journal of Modern Engineering Research (IJMER) www.ijmer.com Vol.2, Issue.6, Nov-Dec. 2012 pp-4443-4449 ISSN: 2249-6645loads, material, boundary conditions, and other factors, surfaces can come into and go out of contact with each other in a largelyunpredictable and abrupt manner.
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