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...Haryana state board of technical education learning text booklet physics st diploma year january developed by in collaboration with national institute bays teachers training research sector panchkula chandigarh preface polytechnics plays a very vital role human resource development the country creating skilled manpower enhancing industrial productivity and improving quality life aim polytechnic particular is to create pool skill based support shop floor field operations as bridge between technician engineers moreover small medium scale industry prefers employ holders because their special skills reading interpreting drawings estimating costing billing supervision measurement testing repair maintenance etc despite plethora opportunities available for pass out students unprecedented expansion recent years has brought its wake questions about imparted during last few seeking admissions are coming mainly from rural background face major challenge understanding contents various subjects eng...