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| - Principles of air conditioning Air cooling, Different systems of ducting and distribution,Essentials of air-conditioning system.UNIT-5 PUMPS AND MACHINERIES 10Reciprocating, Centrifugal, Deep well, Submersible, Automatic pumps, Sewerage pumps, Compressors, Vacuumpump ??? their selection, installation and maintenance ??? Hot water boilers ??? Classification and types of lifts, liftcodes, rules stru
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