- Smoothness of Opening and Closing: No malfunction after ≥ 500 repeated tests
- Wind Resistance: No structural deformation under simulated strong wind conditions
- Material Thickness: Aluminum alloy/fiber ribs meet load-bearing standards
- Waterproof Performance: Fabric hydrostatic pressure ≥ 1500mm
- Sewing Craftsmanship: Uniform stitch length (8–9 stitches per inch), no loose threads
- Coating Uniformity: No missed coating or clumping
- Handle Assembly: Firm without looseness, comfortable grip
- Switch Mechanism: Moderate spring tension, reliable locking
- Metal Components: No rusting after ≥ 24 hours of salt spray testing
- Load-bearing Test: Maintains 3kg suspension for 24 hours
- Packaging Integrity: Standard folding, adequate protection
- Clear Labeling: Firmly printed LOGO and care labels
Key Indicators: Opening-closing qualification rate ≥ 99.5%, windproof rating ≥ Level 6, average service life ≥ 1 year (under normal use)
Acceptable Sampling Ratio: AQL 1.0 (major defects), AQL 4.0 (minor defects)
