Metallurgy Difference BetweenInterstitial Defect&Substitutional Defect Difference BetweenSchottky Defect&Frenkel Defect Related differences: Difference Between Homogeneous and Heterogeneous WeldingDifference Between DCEN Polarity and DCEP Polarity in Arc WeldingDifference Between Machining and FabricationDifference Between Production, Manufacturing and Machining