一本大道久久a久久综合婷婷丨欧美一卡二卡丨国产亚洲精品ae86丨999精品在线视频丨久久男人的天堂丨毛片网站入口丨强制高潮18xxxxhd日韩丨国产在线视频福利丨亚洲夜夜夜丨色欲久久久天天天综合网丨免费黄色视屏丨亚洲综合另类小说色区一丨另类激情综合丨床戏高潮呻吟声片段丨99vv1com这只有精品丨国产精品后入内射日本在线观看丨少妇精品一区二区三区在线观看丨欧美黄页丨高清国产一区二区三区丨亚洲人亚洲人成电影网站色丨夜夜添无码试看一区二区三区丨无码高潮喷吹在线播放亚洲丨亚洲国产精品久久人人爱潘金莲丨亚洲欧美一区二区三区不卡丨日本免费区

It mainly includes three categories 1. Textile additives: spinning oil agents, antistatic agents, textile wax agents, polishing agents, mercerizing agents, bleaching agents, etc 2. Printing and dyeing aids: emulsifiers, scouring aids, penetrating agents, wetting agents, leveling agents, dispersants, detergents, reducing agents, fixin...

I, Review of the Development Process of Printing and Dyeing Assistants The world additive industry began in the 1930s, initially almost entirely used in the textile industry, and later entered the daily chemical industry, such as detergents, but still dominated by textile additives. In the 1950s, it expanded to industries such as petrochemi......

Waterproofing agents can be divided into two categories based on their carbon chain structure, one is fluorinated waterproofing agents, and the other is fluorine-free waterproofing agents. Currently, the most commonly used fluorinated waterproofing agents are carbon eight waterproofing agents and carbon six waterproofing agents. Carbon eigh...

Preparation of common buffer solutions: PH value Preparation method 0 1mol/lHCl 1 0.1mol/lHCl 2 0.01mol/lHCl 3.6 NaAc.3H20 8g, dissolve in an appropriate amount of water, add 6 mol/l HAc 134ml, and dilute to 500ml 4.0 NaAc.3H20 20g, dissolve ......

1. Jingliu Phenomenon: In the warp direction of the fabric, the entire warp yarn appears to shine or darken regularly or irregularly, with one or more shadow stripes. Cause: Shading caused by differences in color absorption during fabric dyeing due to factors such as warp material or tension. Solution: Maintain consistency in tension ......