TB/T 1808-2007.Electric Equipment and Cooling-heating Equipment for Railway Mech...

行业标准2023.08.07

YD/T 809-1996.1范围YD/T 809规定了邮资信封的定义、品种规格、技术要求、试验方法、检验规则和包装、标志、贮存。YD/T 809适用于邮政通信...

行业标准2023.08.07

YD/T 640-2012.General requirements and test methods for radio-frequency connecto...

行业标准2023.08.07

YD/T 627-2012.Parameters,transmission characteristics and test methods of the di...

行业标准2023.08.07

YY/T 0771.4-2015/ISO/TR 22442-4 :2010.Medical devices utilizing animal tissues a...

行业标准2023.08.07

YD/T 841.4-2016.Plastic duct for telecommunication underground conduit Part 4: S...

行业标准2023.08.07

YD/T 841.3-2016.Plastic duct for telecommunication underground conduit Part 3: D...

行业标准2023.08.07

YD/T 841.2-2016.Plastic duct for telecommunication underground conduit Part 2: S...

行业标准2023.08.07

YD/T 841.1-2016.Plastic duct for telecommunication underground conduit Part 1: g...

行业标准2023.08.07

TB/T 1818-2009.Components of diesel engine for locomotive and rail car Connectin...

行业标准2023.08.07