GB/T 39179-2020.Guideline for diagnosis of circular industrial chains in industrial parks.1范围GB/T 39179规定了工业园区循环产业链诊断的诊断原则、诊断流程、结...
GB/T 39138.1-2020.Methods for chemical analysis of gold nickel chromium iron silicon boron alloys-Part 1 :Determination of gold content-Potentiometric titration using ferrous sulfat...
GB/T 39144-2020.Test method for magnesium content in gallium nitride materials-Secondary ion mass spectrometry.1范围GB/T 39144规定了氮化镓材料中镁含量的二次离子质谱...
GB/T 39138.3-2020.Methods for chemical analysis of gold nickel chromium iron silicon boron alloys-Part 3: Determination of chromium, iron, silicon and boron contents-Inductively cou...
GB/T 39551.2-2020.Patent navigation guide-Part 2 :Regional planning.1范围GB/T 39551.2提供了区域规划类专利导航的通用指导。GB/T 39551.2适用于:一区域规划类专...
GB/T 39219-2020.Design guides for post-treatment of desalinated seawater.1范围GB/T 39219提供了海水淡化水后处理设计的设计原则、一般规定、矿化、pH值调节、...
GB/T 39551.3-2020.Patent navigation guide-Part 3 : Industrial planning.1范围GB/T 39551.3提供了产业规划类专利导航的通用指导。GB/T 39551.3适用于:一产业规划类...
GB/T 39203-2020.Technical specifications for extraction of valuable metals from copper smelting dust.1范围GB/T 39203规定了铜冶炼烟灰提取有价金属的基本要求、工艺...
GB/T 39201-2020.Technical specifications for extraction of aluminum oxide from high-alumina fly ash.1范围GB/T 39201规定了高铝粉煤灰提取氧化铝的技术原理、原料要...
GB/T 39085.2-2020.Ships and marine technology-Marine radar reflectors-Part 2:Active type.1范围通常,由玻璃纤维增强塑料(glassfibrereinforcedplastic,GRP)建造的小型船舶...
