专利 基于双层区块链的电子保函管理方法及装置
ISO IEC 14763-2 2019 Information technology — Implementation and operation of customer premises cabling — Part 2 Planning and installation.pdf
ISO 7639-1985Road vehicles. Diagnostic systems. Graphical symbols first edition.pdf
ISO 16592 2012 Microbeam analysis Electron probe microanalysis Guidelines for determining the carbon content of steels using a calibration curve method.pdf
ISO 24998 2008 Plastics laboratory ware — Single-use Petri dishes for microbiological procedures.pdf
ISO IEC 17982 2021 Information technology — Telecommunications and information exchange between systems — Close capacitive coupling communication physical layer (CCCC PHY).pdf
ISO 8212-1986Soaps and detergents. Techniques of sampling during manufacture first edition.pdf
ISO 2257 1980 Office machines and printing machines used for information proces.pdf
ISO 23231 2008 Textiles — Determination of dimensional change of fabrics — Accelerated machine method.pdf
ISO-IEC 23001-14 2019-AMD1 2021 Amendment 1 - Information technology - MPEG systems technologies - Part 14 Partial file format - Support for HTTP entities enhanced file type and byte-range priorities..pdf
ISO 13015 2013 Woven fabrics — Distortion — Determination of skew and bow.pdf
GB-T 2008-1987 散装氟石取样、制样方法.pdf
GB-T 32996-2016 表面化学分析 辉光放电发射光谱法分析金属氧化物膜.pdf
GB-T 17880.6-1999 铆螺母技术条件.pdf
GB-T 30691-2014 输送带 试验环境和状态调节时间.pdf
GB-T 26672-2011 道路车辆 带调节器的交流发电机试验方法.pdf
GB 20007-2005 木工机床安全 单轴铣床.pdf
GB-T 21136-2007 打叶烟叶 叶中含梗率的测定.pdf
GB-T 4008-2008 锰硅合金.pdf
GB-T 4854.4-1999 声学 校准测听设备的基准零级 第4部分 窄带掩蔽噪声的基准级.pdf
GB-T 13477.16-2002 建筑密封材料试验方法 第16部分 压缩特性的测定.pdf