GB/T 31211.1-2024 Chinese PDF (GB/T31211.1-2024) GB/T 8223.1-2025 English versions: GB/T 29326-2023

English versions: GB/T 29326-2023

GB/T 45006-2024_Chinese: Pultruded fiber reinforced polymer composite planks for wind turbine blades (Chinese: 风电叶片用纤维增强复合材料拉挤板材)

GB/T 19720-2024_Chinese: Jewellery and precious metals - Determination of platinum and palladium - Gravimetry using ammonium chloride and dimethylglyoxime (Chinese: 首饰和贵金属 铂、钯含量的测定 氯化铵重量法和丁二酮肟重量法)

4-2023_Chinese: Petroleum and natural gas industries - Glass-reinforced plastics (GRP) piping - Part 4: Fabrication

GB/T 31211.1-2024 Chinese PDF (GB/T31211.1-2024) GB/T 8223.1-2025 English versions: GB/T 29326-2023GB T 31211. 1 2024_Chinese: Non destructive testing Ultrasonic guided wave testing Part 1: General principle (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 31211. 1 2024