First, weld the butt seams on the bottom plate of the furnace, with radiating and symmetric welding conducted from the central point.
先焊炉底板间对接焊缝，由中间往四同辐射对称焊接。
First, weld the butt seams on the bottom plate of the furnace, with radiating and symmetric welding conducted from the central point.
先焊炉底板间对接焊缝，由中间往四同辐射对称焊接。
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