GB/T 7689.3 — 增强材料机织物试验—宽度和长度 GB/T 7689.3-2013 增强材料机织物试验—宽度和长度. CNAS-accredited laboratory test standard. Version reference only. No standard text. GB 1033.1 1462 13657 5169.16 5349 228.1 7690.3 GB 9274 1771 1452 5169.12 4618.2 Testing: info@leisa.com