GB-T 3451-1982 标准调音频率
ISO 5821 2009 Resistance welding — Spot welding electrode caps.pdf
ISO 7256-2 1984 Sowing equipment — Test methods — Part 2 Seed drills for sowing in lines.pdf
ISO IEC 12246 1993 Information technology — 8 mm wide magnetic tape cartridge dual azimuth format for information interchange — Helical scan recording.pdf
ISO IEC 27000 2018 Information technology — Security techniques — Information security management systems — Overview and vocabulary.pdf
ISO-IEC GUIDE 17 2016 Guide for writing standards taking into account the needs of micro small and medium-sized enterprises.pdf
ISO 26430-2 2008 Digital cinema (D-cinema) operations — Part 2 Digital certificate.pdf
ISO IEC 25436 2006 Information technology — Eiffel Analysis, Design and Programming Languag.pdf
ISO-IEC 30143 2020 Internet of Things (IoT) - Underwater acoustic sensor network (UWASN) - Application profiles.pdf
ISO 7076-5 2014 Fire protection Foam fire extinguishing systems Part 5 Fixed compressed air foam equipment.pdf
ISO 18747-2 2019 Determination of particle density by sedimentation methods — Part 2 Multi-velocity approach.pdf
GB-T 28386-2012 印刷、纸加工、造纸机械和辅助设备的噪声测量方法 准确度等级2和3.pdf
GB-T 2654-2008 焊接接头硬度试验方法.pdf
GB-T 41162-2022 特殊物理性能合金钢铸件.pdf
GB-T 21227-2021 交流损耗测量 多丝复合超导材料磁滞损耗的磁强计测量法.pdf
GB-T 37153-2018 电动汽车低速提示音.pdf
GB-T 652-2003 化学试剂 氯化钡.pdf
GB-T 24044-2008 环境管理 生命周期评价 要求与指南.pdf
GB-T 14042-1993 液压缸活塞杆端柱销式耳环安装尺寸.pdf
GB-T 32593-2016 轨道交通 地面装置 变电所用电力电子变流器.pdf
GB-T 23297-2009 造船 船体型线 几何数据的标识.pdf