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