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safety management propellents types of heat exchanger laws of radiation planning organization market types of market stock and flow concept concepts pf national income national income electromagnetic flow meter posiive displaceme flow meterntt rotameter venturimeter flow meter dislocations grain & edge dislocations crystallograohic planes nd directions miller indices cooling curves for metal materials of sci.& techno separation process air pollution prevention cyclohexane msds chemical kinetics order molecularity mass transfer operation leaching sigma blade mixer type of mixer instrumentation manometer type enlarged leg manometer pressure measuring device types of azeotropes chemistry azeotropes and basic conceots of it gas absorption bio-fertilizers explosives