GB/T 13511.4-2025 Chinese PDF (GB /T13511.4-2025)

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GB/T 13511.4-2025 Chinese PDF (GB /T13511.4-2025)GB T 13511. 4 2025_Chinese: Assembled spectacles Part 4: Multifocal and power variation near vision spectacles (Chinese: 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 13511. 4 2025

English versions: GB/T 15074-2025

4-2025_Chinese: Assembled spectacles - Part 4: Multifocal and power-variation near-vision spectacles (Chinese: 配装眼镜第4部分：多焦和渐变焦老视成镜)

English versions: GB/T 19277

61-2025_Chinese: National food safety standard - Food contact materials and products - Determination of migration of 2

GB 11984-2024_Chinese: Technical specification for chlorine safety of chemical industrial enterprises (Chinese: 化工企业氯气安全技术规范)

1-2025_Chinese: Nickel base brazing filler metals - Part 1: Solid brazing filler metals (Chinese: 镍基钎料第1部分：实心钎料)

English versions: GB/T 14851-2025

GB/T 1480-2025_Chinese: Metallic powders - Determination of particle size by dry sieving (Chinese: 金属粉末干筛分法测定粒度)

English versions: GB 23826-2025

GB/T 13000-2025_Chinese: Information technology - Universal coded character set(UCS) (Chinese: 信息技术通用编码字符集（UCS）)

GB/T 17554

English versions: GB 20827-2025