World J. Mech. Vol.3 No.8, November 14, 2013 DOI:10.4236/wjm.2013.38034
World J. Mech. Vol.3 No.8, November 14, 2013 DOI:10.4236/wjm.2013.38033
World J. Mech. [ISSUE], [PUBDATE] DOI:[DOI]