日韩在线一线二浅免费,久桃高清综合社区,日韩欧美涩综合,精品在线91

Classified according to the use of printed materials, such as book printing, newspaper printing, advertising printing, banknote printing, map printing, stationery printing, packaging printing, special printing, etc.(1) B

As soon as the environmental protection policy is about to change the current situation of the oversupply industry, the layout of the printing business will also shift, so the printing enterprises begin to rush to establ

3M Millennium Roll is made of high-strength man-made fabric fibers. Under specific temperature, humidity and pressure, the cut part has self-healing effect. Its porous nonwoven structure has the characteristics of water

In recent years, with the accelerated pace of industrial upgrading of China#39;s textile industry, the product structure of the textile machinery market has undergone tremendous changes. The proportion of traditional tex

1. Blanking: seamless steel pipe for roll body, 45 # round steel for shaft head and flange plates at both ends2. Turning: turning the mating parts of the roller body, end plate and shaft head,3. Welding processing: (acco