The GB/T 23321-2009 standard focuses on the water resistance of Spinning & weaving products and uses horizontal jet and rain testing to determine. The standard specifies the preparation of samples, specifies the selection, size and Pre-treatment method of fabrics. Detailed test equipment requirements, including nozzle specifications, jet angle, water flow speed and other parameter settings, as well as test operation procedures. According to this standard, the water resistance performance of Spinning & weaving products in the horizontal direction can be accurately evaluated. This provides a key reference for Spinning & weaving enterprise Product Research & Development and quality control, and helps it develop better waterproof Spinning & weaving products to meet the actual needs of outdoor products, rain gear and other industries.