1. Different structure
The disposable three-layer mask is made of two layers of fiber non-woven fabric, which is used for medical and health care. One layer is added in the middle, and more than 99% of the filter solution spray cloth is welded by ultrasonic [...]
Type-C interface
The type-C interface, or usb-c for short, is located at the bottom of the smartphone and is mostly used for charging, data transmission and other purposes. The biggest feature of type-C double-sided pluggable interface is that it supports double-sided insertion of USB interface, [...]
According to the needs of various bodies and coatings, different special “water plating” solutions are provided. The plated parts are placed in the water plating solution at room temperature (15-40 ℃), shaking slightly, and can be completed in a short time (such as silver [...]
There are three main types: Bordeaux, Burgundy and all-purpose glasses. Bordeaux glasses are taller and narrower than Burgundy glasses to preserve the aroma of Bordeaux wine. The capacity ranges from 12 to 18 ounces.
These two glasses, named after the grape producing areas, can indeed [...]
Cloth-printed copperplate paper is pressed with old blankets. It not only has smooth surface and high whiteness, but also makes the printed graphics and pictures have a three-dimensional sense. Therefore, this kind of copperplate paper can be widely used for printing pictures, advertisements, landscapes, [...]
classification
Canvas, also known as awning cloth, is usually made of 58 (10 inch) 4-7 strands of thread. The fabric is firm and folding resistant, and has good waterproof performance. It is used for automobile transportation, outdoor warehouse covering and outdoor tent building.
Fine canvas warp [...]
1. Whiteness: no obvious color is required for the exposed glass.
2. Bubbles: a certain number of bubbles of a certain width and length are allowed, but those that can be pierced by a steel needle are not allowed.
3. Transparent pimple: refers to the glass [...]
First, wash your hands frequently. Including before, during and after food preparation; after coughing or sneezing; when taking care of patients; after defecation before meals; when hands are dirty; immediately wash hands with soap, alcohol containing hand sanitizer and water after handling animals or [...]
Embroidery seal is also known as embroidery seal. The English translation is: embroidery patch. Advantages: different from traditional embroidery, it is easier to match clothes, and the finished clothes can also be pasted with embroidery seal (logo) to achieve high-end effect. Traditional embroidery is [...]
Opaque
In addition to the deterioration of food, light can also cause changes in protein and amino acids. Vitamin C is more likely to react with other food ingredients when exposed to light, resulting in a large amount of loss. According to research and analysis, [...]