00329nam a2200121Ia 4500008004100000041000800041082001400049100001700063245003200080250001200112260005600124650002700180230711s9999||||xx |||||||||||||| ||und||  aENG  a624bHR-O  aHardaynath R 0aOptical workshop technology  a1st Ed.  c1993aNew DelhibTata McGraw Hill Education Limited  aMechanical Engineering