Complete, Detailed, Proper, Easy Explanation Of Concepts Like : Simple & Complex Machines, An Inclined Plane, Archimedes’ Screw, A Wedge, 1st Order, 2nd Order, 3rd Order Lever, A Pulley, A Wheel & Axle, Maintenance of machines & At Last Summary Of Lesson NO. 12. SIMPLE MACHINES Of Class 6 Maharashtra State Board General Science Textbook In Hindi Language With Example, Analogy, Etc In 1 Shot Lecture Video.