GB/T 20317-2023 Chinese PDF (GB/T20317-2023) GB/T 45323-2025 1-2024_Chinese: Non-destructive testing - Penetrant

1-2024_Chinese: Non-destructive testing - Penetrant testing - Part 1: General principles (Chinese: 无损检测 渗透检测 第1部分：总则)

English versions: GB/T 45058-2024

GB/T 29021-2023_Chinese: Petroleum drilling and production equipment - Beam pumping unit (Chinese: 石油天然气钻采设备 游梁式抽油机)

4-2025_Chinese: IPv4/IPv6 network security protection technical specifications - Part 4: Content delivery network (Chinese: IPv4/IPv6网络安全防护技术规范 第4部分：内容分发网络)

English versions: GB/T 16843-2023

GB/T 20317-2023 Chinese PDF (GB/T20317-2023) GB/T 45323-2025 1-2024_Chinese: Non-destructive testing - PenetrantGB T 20317 2023_Chinese: Fused extrusion and deposition modeling machines Testing of the accuracy (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20317 2023