GB/T 45344-2025 Chinese PDF (GB /T45344-2025) GB/T 45059-2024 English versions: GB/T 44473-2024

English versions: GB/T 44473-2024

English versions: GB/T 45417-2025

3-2025_Chinese: Optics and photonics - Test methods for telescopic systems - Part 3: Telescopic sights (Chinese: 光学和光子学 望远镜系统试验方法 第3部分：瞄准望远镜)

English versions: GB/T 18737

English versions: GB/T 17818-2025

GB/T 45344-2025 Chinese PDF (GB /T45344-2025) GB/T 45059-2024 English versions: GB/T 44473-2024GB T 45344 2025_Chinese: General technical requirements for fabricated and prefabricated gas piping used in buildings (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45344 2025