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English versions: GB/T 45244-2025
2-2025_Chinese: Semi-finished spectacle lens blanks - Part 2: Power-variation (Chinese: 半成品镜片毛坯 第2部分：渐变焦)
English versions: GB/T 45363-2025
GB/T 25105
GB/T 45298-2025_Chinese: Soil mapping - Specification for the symbols
GB 20052-2024 Chinese PDF GB/T 45456-2025 English versions: GB/T 45244-2025GB 20052 2024_Chinese: Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 20052 2024
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