GB/T 15268-2024 Chinese PDF (GB /T15268-2024) GB 31604.31-2025 GB/T 20725-2025_Chinese: Microbeam analysis -

GB/T 20725-2025_Chinese: Microbeam analysis - Electron probe microanalysis - Guidelines for qualitative point analysis by wavelength dispersive X-ray spectrometry (Chinese: 微束分析 电子探针显微分析 波谱法定性点分析导则)

and the use of cast irons (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2部分：抗开裂碳钢、低合金钢和铸铁)

GB/T 18916

socket-outlets and connectors for ship and shore power supply system (Chinese: 工业用插头插座和耦合器 第6部分：船舶岸电系统用直流插头、插座和连接器)

English versions: GB/T 20972

GB/T 15268-2024 Chinese PDF (GB /T15268-2024) GB 31604.31-2025 GB/T 20725-2025_Chinese: Microbeam analysis -GB T 15268 2024_Chinese: Mulberry silkworm fresh cocoons (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15268 2024