can a laser welding system be used for copper nickel welding

is a 300w scanning laser welding machine enough for welding red copperwhat wattage fiber transmission laser welding machine do i need for spot weldingwhat is the best automatic laser welding machine for welding red copperwhat wattage handheld laser welder do i need for staircase fabricationcan a 200w jewelry laser welding machine weld copperis a continuous laser welding machine good for welding carbon steelis a 300w mold laser welding machine enough for welding hardened steelis a 4000w automatic laser welding machine enough for welding titaniumlaser welding robot for steelis a 200w jewelry laser welder enough for welding gold
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