patented product 、The drainage speed is fast. 、reduce the load on the gutter 、patented product 、The drainage speed is fast. 、reduce the load on the gutter
patented product 、The drainage speed is fast. 、reduce the load on the gutter 、patented product 、The drainage speed is fast. 、reduce the load on the gutter
Efficient rainwater drainage from large building roofs, occupying minimal space, suitable for modern factories, warehouses, stations, exhibition halls, theaters, etc.
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