GB 7300.304-2024 Chinese PDF GB 25596-2025 GB/T 21638-2025_Chinese: Microbeam analysis -

GB/T 21638-2025_Chinese: Microbeam analysis - Guidelines for electron beam microanalysis of defects in steel materials (Chinese: 微束分析 钢铁材料缺陷电子束显微分析方法通则)

GB/T 41771

4-2025_Chinese: Acoustics - Laboratory measurement of sound insulation of building elements - Part 4: Measurement procedures and requirements (Chinese: 声学 建筑构件隔声的实验室测量 第4部分：测量程序和要求)

English versions: GB 1002-2024

GB/T 44939-2024_Chinese: Guidelines for quality grading of consumer products - Footwear (Chinese: 消费品质量分级导则 鞋类)

GB 7300.304-2024 Chinese PDF GB 25596-2025 GB/T 21638-2025_Chinese: Microbeam analysis -GB 7300. 304 2024_Chinese: Feed additives Part 3: Minerals and their complexes(or chelates) Ferrous glycine complex (Chinese: 3 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 7300. 304 2024