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2-2025_Chinese: Optics and photonics - Test methods for telescopic systems - Part 2: Binoculars (Chinese: 光学和光子学 望远镜系统试验方法 第2部分：双筒望远镜)
GB/T 45015-2024_Chinese: Technical specifications for comprehensive utilization of titanium gypsum (Chinese: 钛石膏综合利用技术规范)
GB/T 25139-2025_Chinese: Ceramic foam filter for foundry (Chinese: 铸造用泡沫陶瓷过滤网)
English versions: GB/T 45207-2025
GB/T 30685-2024 Chinese PDF (GB/T30685-2024) GB/T 17692-2024 2-2025_Chinese: Optics and photonics -GB T 30685 2024_Chinese: Technical requirements for vertical road transportation of gas cylinder (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 30685 2024
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