... tools: cutting board, cutting wheel, knife, welding light, oxygen welding gun, heat gun, welding inverter, laser cutting machine and other metals3. ... in any places without ventilation. Such as in office, home, pipeline, mine crater, water well, tunnel, and cellar etc.5. ... , 50--60HZ2. Input power: <3.5KW3. Power system size: 390X190X140mm4. Power system weight: 8kgs5. Pafi Gun weight: 0.9kgs6. Flame ...