首頁
資料下載
HSE資料
行業資訊
技術發展
論文下載
化工知識
標準下載
首頁
> YD通信行業標準免費下載
全部
此欄目暫無任何新增信息
專題列表
更多專題
推薦列表
JJF 1986-2022 差壓式氣密檢漏儀校準規范 Calibration Specification for differential pressure air leakage testers
2023-10-15
JB/T 5676-2016 茶葉抖篩機 Tea vibrating-shifting machine
2023-10-15
NF C32-077-1-2019 Tests for electric cables under fire conditions - Circuit integrity - Part 1 : test method for fire with shock at a temperature of at least 830oC for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter e
2023-10-15
JIS C62841-2-5-2020 電動手持式工具、可運輸工具、草坪和花園機械--安全--第2-5部分：手持式圓鋸的特殊要求 Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery--Safety--Part 2-5: Particular requirements for hand-held circular saws
2023-10-15
JB/T 11769.2-2014 大型精密數控滾齒機 第2部分:技術條件 Large-sized & precision CNC gear hobbing machines--Part 2:Specifications
2023-10-15
QB/T 5231-2018 安全錘 Safety hammer
2023-10-15
NF E17-401-1-2016 Heat meters - Part 1 - general requirements
2023-10-15
QB/T 5610-2021 硬質聚氯乙烯發泡建筑模板 Unplasticized polyvinyl chloride foam boards for concrete-form
2023-10-15
UL 796 BULLETIN/2-2018 UL Standard For Safety Printed-Wiring Boards
2023-10-15
KS M ISO 8308-2018 Rubber and plastics hoses and tubing — Determination of transmission of liquids through hose and tubing walls
2023-10-15
亚洲美女对大黑_久久夜色撩人精品国产_精品一区二区在线播放_香蕉久久人人97超碰CAOPROEN
