GB/T 29712-2023 Chinese PDF (GB/T29712-2023) GB/T 17821-2025 4-2024_Chinese: Ships and marine technology

4-2024_Chinese: Ships and marine technology - Protective coatings and inspection method - Part 4: Automated measuring method for the total amount of water-soluble salts (Chinese: 船舶与海上技术 保护涂层和检查方法 第4部分：水溶性盐总含量的自动化测量方法)

GB/T 14207-2024_Chinese: Test method for water absorption of sandwich constructions or cores (Chinese: 夹层结构或芯子吸水性试验方法)

GB 20072-2024_Chinese: The requirements of safety in the event of rear-end collision for passenger car (Chinese: 乘用车后碰撞安全要求)

GB/T 30771-2024_Chinese: Domestic devitroceram (Chinese: 日用玻璃陶瓷)

9-2025_Chinese: Information technology - Biometric sample quality - Part 9: Vascular image data (Chinese: 信息技术 生物特征样本质量 第9部分：血管图像数据)

GB/T 29712-2023 Chinese PDF (GB/T29712-2023) GB/T 17821-2025 4-2024_Chinese: Ships and marine technologyGB T 29712 2023_Chinese: Non destructive testing of welds Ultrasonic testing Acceptance levels (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 29712 2023