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GB/T 20867
drill pipe and line pipe used as casing or tubing (Chinese: 石油天然气工业 套管、油管、钻杆和用作套管或油管的管线管性能公式及计算)
GB/T 45250-2025_Chinese: Telecom and internet services - Standardization guideline (Chinese: 电信和互联网服务 标准化工作指南)
GB 44018-2024_Chinese: Line-throwing appliances for ship (Chinese: 船用抛绳器)
2-2024_Chinese: Ergonomics - Accessible design - Part 2: Method for creating colour combinations taking account of age-related changes in human colour vision (Chinese: 人类工效学 无障碍设计 第2部分：考虑颜色视觉随年龄变化的颜色组合方法)
GB/T 2820.7-2024 Chinese PDF (GB/T2820.7-2024) GB/T 3543.1-2025 GB/T 20867GB T 2820. 7 2024_Chinese: Reciprocating internal combustion engine driven alternating current generating sets Part 7: Technical declarations for specification and design (Chinese: 7) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 2820. 7 2024
