GB/T 2879-2024 Chinese PDF (GB/T2879-2024) GB/T 20183.2-2024 3-2025_Chinese: Petroleum and natural gas

3-2025_Chinese: Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 3: Cracking-resistant CRAs(corrosion-resistant alloys) and other alloys (Chinese: 石油天然气工业 油气开采中用于含硫化氢环境的材料 第3部分：抗开裂耐蚀合金和其他合金)

2-2024_Chinese: Standard practice for determining the metallographical constituent and inclusion content of steels and other metals by automatic image analysis - Part 2: Determining the inclusion ratings of steels by automatic image analysis and stereology (Chinese: 应用自动图像分析测定钢和其他金属中金相组织、夹杂物含量和级别的标准试验方法 第2部分：钢中夹杂物级别的图像分析与体视学测定)

English versions: GB/T 45591-2025

GB/T 44890-2024_Chinese: Specification for administrative license (Chinese: 行政许可工作规范)

GB/T 45633-2025_Chinese: Collection and processing of human saliva biomaterial (Chinese: 人类唾液样本采集与处理)

GB/T 2879-2024 Chinese PDF (GB/T2879-2024) GB/T 20183.2-2024 3-2025_Chinese: Petroleum and natural gasGB T 2879 2024_Chinese: Hydraulic fluid power Cylinders Dimensions and tolerances of housings for single acting piston and rod seals in reciprocating applications (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 2879 2024