which mold laser welding machine is best for plastic mold repair

do i need training to use an open laser welding machineis a laser oil removal machine safe to usewhat power fiber laser welder do i need for nickelportable fiber laser welding machine for railing weldinglaser welding equipment cost1500 watt handheld laser welder for titanium400w metal laser welding machine for zinc plated steelis a 150w jewellery laser welding machine enough for welding gold alloy1.5kw continuous automatic fiber laser welding machine for stainless steelcan a 500w galvanometer laser welding machine weld sheet metal
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