A hairdressing scissor assembly includes plural pairs of hairdressing scissors each having two cutting members pivotally connected together, female and male connectors respectively secured to first and second sides of the pairs of hairdressing scissors for joining the pairs of hairdressing scissors. The size setting unit sets the size of a specific subject in the width direction and in the depth direction in a target image generated through imaging. A selected build-up material is deposited onto the substrate by high velocity oxy-fuel deposition or low pressure plasma spray. A second switching circuit is inserted between one end of the resistor element Ri and a second power sourceline.