GB/T 2878.1-2025 Chinese PDF (GB /T2878.1-2025) GB/T 13511.4-2025 4-2025_Chinese: Uncut finished spectacle lenses

4-2025_Chinese: Uncut finished spectacle lenses - Part 4: Anti-reflective coatings test methods (Chinese: 眼镜镜片 第4部分：减反射膜试验方法)

GB/T 28807

English versions: GB/T 18822

GB/T 14600-2025_Chinese: Electronic gas - Nitrous oxide (Chinese: 电子气体 一氧化二氮)

GB/T 30134-2025_Chinese: Specification for cold store management (Chinese: 冷库管理规范)

GB/T 2878.1-2025 Chinese PDF (GB /T2878.1-2025) GB/T 13511.4-2025 4-2025_Chinese: Uncut finished spectacle lensesGB T 2878. 1 2025_Chinese: Connections for hydraulic fluid power Ports with truncated housing and stud ends with metric threads Part 1: Ports with truncated housing (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 2878. 1 2025