Petrochemicals HS code research

List of contents of this article:

• 1,Petrochemicals HS code researchHow to view the system diagram of the electrician drawing
• 2, w How to view the built-in desktop background picture and the folder where the theme is located in the in10 system
• 3, How to read the fire drawings? Can I teach you here?

How to read the system diagram of the electrician drawing

After getting the drawing, first of all, carefully read the main title column and relevant instructions of the drawing, such as the drawing catalog, technical description, detailed list of electrical components, construction instructions, etc., combined with Existing electrical knowledge, have a clear understanding of the type, nature and function of the electrical diagram, and understand the overview of the drawing and the key points to be expressed from the whole.

How to view the electrician's floor plan: Look at the logo. There are many logos on the electrician's floor plan, including graphic logos and letter logos. These are the legends. Each legend represents a project. For example, if there are three wires through the pipe, they will be marked on the tube///. Distinguish between strong and weak electricity, which can be distinguished by combining the whole system diagram.

To look at the system diagram, you must first look at what graphic symbols and text symbols are, understand the role of each component of the system diagram, and distinguish between the main system and the auxiliary system, AC loop and DC loop. Secondly, look at the picture in the order of looking at the main system first and then looking at the auxiliary system.

Check the size and scale: Pay attention to the size annotation and scale on the drawing in order to understand the actual size and layout of electrical equipment. Pay attention to the hierarchy: Some electrical drawings may contain multiple layers, such as floor plans, wiring diagrams, electrical wiring diagrams, etc. Make sure to understand the specific content and relationship of each layer when viewing the drawings.

It depends on what the drawings contain, so as to have a general understanding of the whole set of drawings, including covers, catalogs, design instructions, system drawings, lighting plans, weak current plans, and detailed pipes.

The basic methods of viewing architectural electrical drawings: view the drawing in combination with the basic knowledge of electrician and electronic technology; combine the structure and working principle of electrical components; combine the typical circuit recognition diagram, the typical circuit is a common basic circuit; view the drawing in combination with the relevant drawing description; view the drawing requirements of the electrical drawing.

How to view the built-in desktop background picture and the folder where the theme is located in the win10 system

1. Which folder is the wallpaper included in win10? First of all, the first step is according to the arrow in the figure below, find Go and double-click the [This Computer] icon. The second step is to open the [This Computer] window, and double-click the local disk C according to the arrow in the figure below.

2. First of all, we open the computer and enter the desktop. Find this computer icon and click to open it. After entering this computer window, we click the local disk c disk below the window. Then we will enter the file directory of the c disk, and we click the WINDOWS folder below the interface.

3. Open "This computer" c disk 2, windows 3, pull down, find "web" double-click 4, find "wallpaper" double-click 5, this is all the background pictures of the system, the theme storage location c disk windowsresouresthemes.

4. The first step is to know that the win10 system wallpaper is saved under the "CWindowsWebWallpaper" path by default, which is mainly placed in the three folders of Windows, Windows 10 and flowers. As shown in the figure below, please click to enter Enter the picture description. In the second step, we open the Windows 10 folder and see the desktop wallpaper picture.

5. Open the C disk of "This Computer"Windows pull-down, find "Web" and double-click to find "Wallpaper" and double-click. This is the background picture of all the system's built-in theme storage location C disk WindowsResouresThemes.

6. Windows; pull down, find "Web" and double-click; find "Wallpaper" and double-click; this is all the background pictures that come with the system; theme storage location: C disk-Windows-Resoures-Themes. After referring to the above tutorial settings, the folder where the Win10 desktop background is located can be easily found.

How to read the fire drawings? Can I teach you here?

1. When reading the fire engineering drawings, novices should first read the overall floor plan carefully. Each building should be clearly separated, and then clearly read the previous drawing design instructions and legends, among which there are various symbols and markings. Then look at the system diagram. Finally, the fire plan of each floor can naturally be read.

2. The view of the fire drawing: the pink line is called the loop bus, the green is the power line, the blue is the telephone line, and the yellow is the broadcast line. In general, except for the fire broadcast speaker and the fire bus telephone branch, a loop bus should be introduced to each other fire device. If there is a control module, a power cord should also be introduced.

3. Before reading the drawings, you must see through the architectural plan. The introduction is generally in the upper left corner of the fire drawing, and it will be clearly marked as fire introduction.Firefighting is generally divided into water, electricity and wind. The drawings may be complicated and messy, but to understand the drawings quickly, you need to find the core.

4. Finally, the floor plan is a further refinement of the system diagram, indicating the installation method, location and connection method of the equipment; (7) Note: When reading the map, the floor plan should be compared with the system diagram to connect the whole system.

5. This fire alarm system should adopt a bus system. Look at the screenshot of your system diagram. From left to right, they are: 1 manual alarm button with telephone jack; 2 emergency power supply boxes, each with 1 input and output module in or on the box; the far right is the bus telephone branch.