600mm to 2000mm Penstock Pipe for Hydropower Spiral Welded Pipe
spiral welding and straight seam welding. Galvanized spiral welding has a wider range of uses but is also more difficult.
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spiral welding and straight seam welding. Galvanized spiral welding has a wider range of uses but is also more difficult.
400mm 500mm 600mm 700mm 800mm 100mm to 2000mm Penstock Pipe for Hydropower