GB/T 20657-2022 Chinese PDF (GB/T20657-2022) GB/T 44955-2024 GB 21252-2023_Chinese: Norm of energy

GB 21252-2023_Chinese: Norm of energy consumption for unit production of architecture and sanitary ceramics and alumina grinding ball (Chinese: 建筑卫生陶瓷和耐磨氧化铝球单位产品能源消耗限额)

GB 23826-2025_Chinese: Light-emitting diode variable speed limit signs of motorway (Chinese: 高速公路LED可变限速标志)

impacts and risk assessment (Chinese: 适应气候变化 脆弱性、影响和风险评估指南)

72-2025_Chinese: National food safety standard - Food additive - Sodium iron (III) ethylenediaminetetraacetate trihydrate (Chinese: 食品安全国家标准 食品营养强化剂 乙二胺四乙酸铁钠  )

GB/T 33798-2025_Chinese: Bio-polyester drum-linkage bags (Chinese: 生物聚酯连卷袋)

GB/T 20657-2022 Chinese PDF (GB/T20657-2022) GB/T 44955-2024 GB 21252-2023_Chinese: Norm of energyGB T 20657 2022_Chinese: Petroleum and natural gas industries Formulae and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing or tubing (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20657 2022