Double stitch sewing technology:
Workers use a sewing machine to stitch the materials together to make a predetermined shape. but there are pinholes and it is easy to run out. so a high-power blower is required to blow continuously.
Sewing products are mainly inflatable amusement devices used on land, such as inflatable trampolines, inflatable slides, inflatable tents, inflatable advertising products, etc. PVC materials are waterproof, but products with needle holes in the sewing thread are not waterproof and will run out of air. The fan keeps blowing air to maintain the shape, and there is a long duct on the product to connect the blower (refer to the last picture)
