GB/T 20972.3-2025 Chinese PDF (GB /T20972.3-2025) GB/T 12643-2025 1-2025_Chinese: Assembled spectacles - Part

1-2025_Chinese: Assembled spectacles - Part 1: Single-vision and multifocal prescription assembled spectacles (Chinese: 配装眼镜 第1部分：单焦和多焦定配眼镜)

English versions: GB 45438-2025

30-2025_Chinese: National food safety standard - Food contact materials and products - Determination of phthalate esters and determination of migration (Chinese: 食品安全国家标准 食品接触材料及制品 邻苯二甲酸酯类化合物的测定和迁移量的测定)

9-2024_Chinese: Specifications for the provision of personal protective equipment - Part 9: Automobile industry (Chinese: 个体防护装备配备规范 第9部分：汽车)

GB/T 20972.3-2025 Chinese PDF (GB /T20972.3-2025) GB/T 12643-2025 1-2025_Chinese: Assembled spectacles - PartGB T 20972. 3 2025_Chinese: Petroleum and natural gas industries Materials for use in H2S containing environments in oil and gas production Part 3: Cracking resistant CRAs(corrosion resistant alloys) and other alloys (Chinese: 3) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20972. 3 2025