GB/T 20042.6-2024 Chinese PDF (GB/T20042.6-2024) GB/T 21638-2025 2-2024_Chinese: Non-destructive testing - Penetrant

2-2024_Chinese: Non-destructive testing - Penetrant testing - Part 2: Testing of penetrang materials (Chinese: 无损检测 渗透检测 第2部分：渗透材料的检验)

English versions: GB 45248-2025

GB/T 28168-2025_Chinese: Information technology - Middleware - Technical requirement for message-oriented middleware (Chinese: 信息技术 中间件 消息中间件技术要求)

English versions: GB/T 45458-2025

English versions: GB/T 26925-2025

GB/T 20042.6-2024 Chinese PDF (GB/T20042.6-2024) GB/T 21638-2025 2-2024_Chinese: Non-destructive testing - PenetrantGB T 20042. 6 2024_Chinese: Proton exchange membrane fuel cell Part 6: Test method of bipolar plate properties (Chinese: 6) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20042. 6 2024