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GB/T 20340
1-2024_Chinese: Mechanical vibration and shock - Characterization of the dynamic mechanical properties of visco-elastic materials - Part 1:PRinciples and guidelines (Chinese: 机械振动与冲击 黏弹性材料动态力学性能的表征 第1部分：原理和指南)
English versions: GB/T 43274-2023
GB/T 45178-2024_Chinese: Man-made fibre - Determination of antioxidant activity - DPPH and ABTS methods (Chinese: 化学纤维 抗氧化活性测定 DPPH和ABTS法)
and line pipe threads (Chinese: 石油天然气工业 套管、油管和管线管螺纹的加工、测量和检验)
GB/T 2516-2023 Chinese PDF (GB/T2516-2023) GB/T 17737.113-2024 GB/T 20340GB T 2516 2023_Chinese: General purpose metric screw threads Limit deviations (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 2516 2023
