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English versions: GB/T 45370-2025
GB/T 37551
5-2025_Chinese: Uncut finished spectacle lenses - Part 5: Abrasion-resistant of surfaces test methods (Chinese: 眼镜镜片 第5部分：表面耐磨试验方法)
English versions: GB/T 20776-2023
GB/T 42513.2-2023 Chinese PDF (GB/T42513.2-2023) GB/T 30489-2024 English versions: GB/T 45370-2025GB T 42513. 2 2023_Chinese: Methods for chemical analysis of nickel alloys Part 2: Determination of phosphorus content Molybdenum blue spectrophotometry (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 42513. 2 2023
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