00289nam a22000977a 4500082001200000100003300012245007100045260002700116300000700143700004100150  aR/3ME17  aAsfand Murad Kalhoroa17ME19  aStaircase Energy Generating System Using Rack and Pinion Mechanism  aNawabshahbQUESTc2020  a45  aDepartment of Mechanical Engineering