00348nam a2200133Ia 4500008004100000020001500041041001200056082001100068100001700079245005500096260003600151300001000187650001700197221030s9999    xx            000 0 und d  a8121914310  aEnglish  a105.23  aR. K. Dhawan 2aA Textbook of Engineering Drawingcby R. K. Dhawan  bS. Chand & Co.aNew Delhic2007  a4.281  aBB Mechanics