(1) true azimuth. The direction line pointing to the North Pole at a certain point is called the true north direction line, and the meridian is also called the true meridian.
The angle measured clockwise from the northern end of the true meridian direction to a straight line is called the true azimuth of the straight line, which is generally denoted by A and is usually used for precise measurement.
(2) magnetic azimuth. The earth is a big magnet, and the magnetic pole position of the earth is the ever-changing true orientation. The direction line pointing to a certain point of the magnetic north pole is called the magnetic north direction line, also called magnetic meridian. The straight line between magnetic south and magnetic north points on the south and north sections of topographic map is the magnetic meridian of the map. The angle measured clockwise from the northern end of magnetic meridian direction to the straight line is called the magnetic azimuth of the straight line, which is expressed by Am.
(3) coordinate azimuth. The angle measured clockwise from the northern end of the coordinate longitudinal axis direction to the straight line is called the coordinate azimuth of the straight line, which is often called azimuth, and is represented by a.
What kinds of azimuth angles are commonly used in hydraulic engineering survey? According to the different directions of the longitudinal axis (X axis) of the coordinate system, they can be divided into the following three types:
1 X axis pointing to true north is called true azimuth;
2 X axis pointing to magnetic north is called magnetic azimuth;
The 3 X axis pointing to the north of the coordinate (assumed coordinate system) is called the coordinate azimuth.
Azimuth refers to the satellite receiving antenna, which rotates 0-360 in the horizontal plane. During azimuth adjustment, the paraboloid moves left and right in the horizontal plane. Usually, the result we get from calculation software or data should be to point the satellite antenna to the east or west by an angle, which is called azimuth, based on the true north direction (around the geomagnetic south pole).
What are the manifestations of angle? There are three kinds.
1. Angle+number Example: Angle 1
2. Angle+Greek letters Example: Angle A.
3. Take the letters of two rays at an angle and the letters of vertices as examples: Angle AOB.
What methods can open the inner corner of the eye? Big eyes can add personal charm, so many people are depressed because of small eyes. Operating on the inner canthus can help you to have big eyes. ? There are several ways to open the inner corner of the eye-Ming medical experts introduced: the operation of opening the inner corner of the eye does not mean that the inner corner of the eye really opens. It just opens the epicanthus covering the inner corner of the eye, exposes the structure of the inner corner of the eye, and achieves the purpose of opening a small eye. ? After opening the inner corner of the eye, it can enlarge the fissure of the eye and make the eyes bright. Many beauty lovers will choose this operation to greatly improve the shape of their eyes. At present, there are many methods used in clinic: "V-Y" suture, "Z" molding and four-flap method. The former is suitable for mild epicanthus, while the latter is suitable for all kinds of epicanthus. The most widely used method is the improved minimally invasive lateral epicanthus correction, which has good effect and no obvious trace after operation. It is an ideal operation. At the same time, it can integrate and locate double eyelids, remove fat minimally, change the shape of eyes as a whole, and achieve a more perfect cosmetic effect. ? Through the establishment of new canthus, the treatment of epicanthus and redundant upper eyelid plate, the formation of canthus angle and lower eyelid, the treatment and aesthetics are integrated, and the small eyes are turned into charming big eyes at one time, which makes the eyes naturally bright and shiny, and solves the problem of too wide distance between the eyes. Postoperative care should be done well to restore the operation to the best state. ? Tips: Opening canthus must be carried out in a regular plastic surgery hospital to ensure the final effect and safety of the operation.
What are some ways to open your eyes in Chongqing? In Chongqing, it is a contemporary beauty hospital, and the locals know it. It is recommended to consult a doctor on the spot ~ you can watch it on the spot!
What are some ways to open your eyes in Guangzhou? It's just a trick. Don't worry, landlord. Guangzhou is a good place, and the Strait is recommended, with mature technology, complete equipment and superb doctors' skills. Ask for adoption!
What methods do grinders make right angles? First, smooth two corresponding planes with large areas to ensure smoothness. Then, make a general right angle with a large number of scholars. After making a right angle, check the right angle with the school table to see how much difference it is, then mark it and put it on a group of scholars to correct it.
Methods: If one end is found to be 0.02mm higher than the right angle, write +0.02mm on the high end with a colored pen. When it is installed in Colonel Pishi, calibrate the marked end to be 0.02mm higher, and then smooth it.
Specific method: 1, with plane right-angle pliers; 2. Use a square.
What methods can make the surface round? There are almost stretching, scanning, rotating and so on, as well as stretching, copying and flattening. The operation method is similar to solid features, such as stretching: draw a sketch (line, curve or circle, polygon), and then enter the stretching length.
Please accept it, thank you!
What kinds of methods are there to open the corner of Fuzhou's eyes, and which one is good? Speaking of which, I have the most say. What I did in Fuzhou Han Ming Hospital seemed natural, and I didn't feel any discomfort for more than a year. Let's make a field trip first!
What kind of beans are poisonous? If they are not cooked, they will be poisoned.
Because beans, like other leguminous vegetables, contain water chestnut and phytoagglutinin, which have a strong * * * effect on gastrointestinal mucosa, destroy and hemolyze cells, and even cause hemorrhagic inflammation in severe cases.
These two toxic substances are not heat-resistant and can be destroyed after sufficient heating.