GB 12656-1990.Determination of electric strength at power trequence for capacito...

国家标准2023.07.20

GB/T 12661-1990.Paper and board-Determination of microbiological properties- Tot...

国家标准2023.07.20

GB 12742-1991.The specifications of testing equipment and measuring appliance fo...

国家标准2023.07.20

GB/T 12809-1991.Laboratory glassware- Principles of design and construction of v...

国家标准2023.07.20

GBT 12914-1991.Paper and board - Determination of tensile properties 一Constant r...

国家标准2023.07.20

GB 13023-1991.Corrugating medium.4.2瓦楞原纸不经外力 作用不许有分层现象。4.3瓦楞原纸的纤维组 织应均匀,纸幅间厚薄- -...

国家标准2023.07.20

GB/T 13216. 1-1991.Test methods for glycerines-Method of sampling for glycerines...

国家标准2023.07.20

GB/T 13216.2一1991.Test methods for glycerines-Determination of transparent.1主题内容...

国家标准2023.07.20

GB/T 13216. 3-1991.Test methods for glycerines-Determination of odour.1主题内容 与适用范...

国家标准2023.07.20

GB/T 13216.4-1991.Test methods for glycerines-Determination of color(Hazen unit-...

国家标准2023.07.20