what watt laser mold repair machine do i need for welding copper

is a 4000w laser welding machine good for metal fabricationcan a 3000w automatic laser welding machine weld tinplate1500w semi automatic laser welding machine for copperwhich is better 1500w or 2000w metal laser welding machine4000w laser spot welding machine for stainless steel150w metal laser welding machine for red copper4000 watt portable fiber laser welding machine for stainless steelwhat is the best metal laser welding machine for fine parts weldingcan a 150w jewelry laser welding machine weld yellow goldwhich continuous automatic laser welding machine is best for welding brass
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