GB/T 45591-2025 Chinese PDF (GB /T45591-2025) GB/T 45271-2025 GB/T 45316-2025_Chinese: Determination of piperine

GB/T 45316-2025_Chinese: Determination of piperine content - Spectrophotometric method (Chinese: 胡椒碱含量的测定 分光光度法)

GB/T 45397-2025_Chinese: Information technology - Big data for ecological environment - System framework (Chinese: 信息技术 生态环境大数据 系统框架)

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/T 22321

English versions: GB/T 31790-2025

GB/T 45591-2025 Chinese PDF (GB /T45591-2025) GB/T 45271-2025 GB/T 45316-2025_Chinese: Determination of piperineGB T 45591 2025_Chinese: Code of practice for phytosanitary phosphine fumigation treatments of fruits and vegetables (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45591 2025