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1-2025_Chinese: Optics and photonics - Specifications for telescopic sights - Part 1: General-purpose instruments (Chinese: 光学和光子学 瞄准望远镜规范 第 1 部分：普通性能仪器)
GB 25972-2024 Chinese PDF GB/T 18299-2024 English versions: GB/T 28988-2024GB 25972 2024_Chinese: Gas fire extinguishing systems and components (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 25972 2024
