Wondering how a 380V industrial laser welder performs in real production? In this video, we demonstrate the OTA-3000 four-in-one handheld fiber laser welding machine in action. You'll see live welding of 5–8mm stainless steel, thin plate cutting, rust removal, and weld seam cleaning — all with one system. We also explain its water-cooled continuous operation, 380V power requirements, and key differences from 220V air-cooled models. A practical walkthrough for factories evaluating high-power laser equipment.