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English versions: GB/T 13748
GB/T 45360-2025_Chinese: Inspection
GB/T 18737
2-2025_Chinese: Optics and photonics - Specifications for telescopic sights - Part 2: High-performance instruments (Chinese: 光学和光子学 瞄准望远镜规范 第 2 部分：高性能仪器)
English versions: GB/T 21667-2024
GB/T 45434.2-2025 Chinese PDF (GB /T45434.2-2025) GB/T 18822.2-2024 English versions: GB/T 13748GB T 45434. 2 2025_Chinese: China standard time Part 2: Metadata (Chinese: 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45434. 2 2025
