GB/T 31033-2025 Chinese PDF (GB /T31033-2025) GB/T 25936.4-2024 GB/T 23480-2025_Chinese: Small hole drilling

GB/T 23480-2025_Chinese: Small hole drilling electrical discharge machines - Testing of the accuracy (Chinese: 电火花小孔加工机床 精度检验)

GB/T 22453-2025_Chinese: Non-linear optical crystal devices measuring method for laser (Chinese: 激光用非线性光学晶体元件性能测量方法)

GB/T 18757-2025_Chinese: Enterprise modelling and architecture - Requirements for enterprise-referencing architectures and methodologies (Chinese: 企业建模与体系结构 企业参考体系结构与方法论的要求)

English versions: GB/T 27772-2025

English versions: GB/T 16981-2025

GB/T 31033-2025 Chinese PDF (GB /T31033-2025) GB/T 25936.4-2024 GB/T 23480-2025_Chinese: Small hole drillingGB T 31033 2025_Chinese: Technical requirements for well control technology of oil and gas drilling (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 31033 2025