The inner tank of the solar water heater storage tank mainly has argon-shielded arc welding and resistance pressing welding. There is a row of vacuum nozzles on the water storage tank. You can see the inner tank of the water storage tank. The weld beside the nozzle is a argon arc welding if you see a weld that is 2~4mm wide, bright and even blue. The product that comes out; if the weld is seen as a strip of horizontal stripes, and the edge of the steel plate can be seen near the weld, it is the inner casing of the electric resistance welded joint.
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