GB/T 14157-2023 Chinese PDF (GB/T14157-2023) GB/T 45283.2-2025 301-2024_Chinese: Electricity metering equipment(AC) -

301-2024_Chinese: Electricity metering equipment(AC) - Particular requirements - Part 1: Multi-function electricity meters (Chinese: 电测量设备（交流） 特殊要求 第1部分：多功能电能表)

English versions: GB/T 45454-2025

62-2025_Chinese: National food safety standard - Food contact materials and products - Determination of migration and release of N-nitrosamines (Chinese: 食品安全国家标准 食品接触材料及制品 N-亚硝胺类化合物迁移量和释放量的测定)

English versions: GB/T 45507-2025

GB/T 45449-2025_Chinese: Revert materials for powder metallurgy superalloy (Chinese: 再生粉末高温合金原料)

GB/T 14157-2023 Chinese PDF (GB/T14157-2023) GB/T 45283.2-2025 301-2024_Chinese: Electricity metering equipment(AC) -GB T 14157 2023_Chinese: Terminology of hydrogeology (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 14157 2023