GB/T 8804.3 — 热塑性塑料管材拉伸性能—聚烯烃管材 GB/T 8804.3-2003 热塑性塑料管材拉伸性能—聚烯烃管材. 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