The medical team from Yuncheng central hospital to Wuhan

1. Piggy Coin is based on erc20 standard contract code, its birth is not how lofty ideal blueprint or more cattle technology, mainly to remind investors to keep a clear mind, enhance vigilance, rational investment. Pig coin focuses on community consensus and is widely circulated. As long as you participate in it, you can give it free. The payment is directly proportional to the income. The main task in the early stage is to increase the number of users who hold pig coin. What you pursue is free, free, always free, participate in community activities, platform airdrop, other currency airdrop, etc.

2. Hehe, banks with foreign exchange business, such as Bank of China, ICBC, CCB, etc...

3.

1. Vinegar bubble method. Wash the coin, put it in a small dish, pour in a little vinegar until it is immersed. Take it out after 24 hours, brush off the resial rust with a small brush until the money lines are clear, then wash the vinegar with clean water, and wipe off the shade. This is a relatively simple and common method, which can deal with all kinds of floating rust, but the effect is often not ideal, and many ancient coins will show yellow marks on the surface after vinegar, affecting the appearance

2. Soaking in boiling water. Sometimes the ancient money will be covered with a layer of clay, but it can't be washed out. In fact, this so-called floating soil is actually a kind of soil rust The mixture of soil and copper rust belongs to alkaline hard clay. For this kind of rust, we can first put the coin into a bowl and pour boiling water at 80-90 ℃ into the bowl until the coin body is immersed

after 5 minutes, take out the money, use a small brush to clean the money lines and the coin body, and then dry it in the shade. When encountering the ancient coins with serious soil rust, the heat can also be heated to boiling to make the soil rust fall off. Practice has proved that this method is very effective for removing soil rust, and it has the great advantage of not damaging the coin slurry. This method can also be used to separate ancient coins along the grain if the grain is blurred or rusty

3. Dry brushing. When copper rust or iron rust is relatively shallow, chemical means such as vinegar bubble should be avoided as far as possible. Instead, dry brush method can be used to clear the money lines. The specific method is: choose a large oil painting, and cut the brown hair on the pen head until it is only 0.5-0.7cm away from the root. First, place the old money on the glass plate and fix it. If it is uneven, pad some cloth under it. Hold the base of the oil painting pen and brush it evenly. Pay attention to the force. Otherwise, the effect is not good. After the floating rust is brushed, wash it with clean water

4. Heating method. This method is mainly used for iron coins with shallow corrosion. The main component of iron rust is ferrous oxide (FeO). The molecular structure of FeO is relatively loose, and the firm degree of its adsorption with the iron coin is far from that of copper coin. Therefore, some iron coins can be separated from the rust by using the principle of thermal expansion and cold contraction

However, when using this method, it is necessary to add a receiving vessel (such as a metal container such as a pot or cup) and some clean water. 2、 Heating time should not be too long, general fire heating three or four minutes later, take out with cold wet towel cover, rust will naturally fall off. 3、 If you choose to use the heating method to remove the rust, you should use the iron coin with good iron quality and shallow rust. You should never use the heating method to remove the rust on the iron coin with serious rust and very fragile body. Otherwise, the already very fragile coin will not be able to withstand high temperature and will be broken to pieces

5. Some of the hard green rust boards are formed into blocks to cover the whole coin. This kind of rust seems to be vertical and hard, but actually it is not firmly attached to the coin. In this case, we can use the knife scraping method. The tool is very simple, a knife used to carve the seal, aiming at the bottom of the rust block, can dig carefully

in case of large pieces of rust that can't be g out for a while, you can put the money on the glass plate first. If the money body is uneven, put some cloth blocks at the lower end, put the knife straight on the rust block, with the knife tip down, and hit it with a heavy weight for several times, then the hardened rust blocks will solve each other. However, you should pay attention to the appropriate weight when using this method. If you are not careful, the money will be scratched all over the body. If you are serious, the whole money will be damaged. Therefore, if you are not sure or are not sure about the precious ancient money, you should use this method carefully

extended data

physical cleaning

physical cleaning is a professional cleaning method, which is a physical method to remove dirt from the surface of materials

Introction

physical cleaning methods have one thing in common: high efficiency, no corrosion, safety, environmental protection, so the research on physical cleaning has been paid more and more attention. Most cleaning projects in developed countries adopt physical cleaning method

Physical cleaning methods: high pressure water jet cleaning, water air cleaning (air agitation), electric pulse cleaning, ultrasonic cleaning, shot blasting cleaning (plastic ball or rubber ball, pig cleaning, mechanical scraping, etc.)

high pressure water jet is a kind of high-pressure water jet which pressurizes ordinary tap water to hundreds or even thousands of atmospheric pressure through high-pressure pump, and then ejects through special high-pressure nozzle (aperture is only 0.3-2 mm) at a very high speed (200-500 M / s)

this stream of small water, like a small bullet, has a huge impact energy. It can cut steel plate, clean casting sand, remove metal rust, and remove salt, alkali, scale and all kinds of blockage on the inner wall of the pipe. High pressure water jet cleaning is to use the water flow with great energy for cleaning

it mainly cleans all kinds of tubular heat exchangers, double effect absorption lithium bromide refrigerators, vertical and horizontal condensers, air preheaters, rehydrators, st collectors, evaporators, reactors, boilers, tanks, containers and heating devices; All kinds of water pipelines, instrial water pipelines, oil pipelines and two-phase flow pipelines, sewage pipelines

characteristics

physical cleaning, in many cases, is dry cleaning, there is no problem of wastewater treatment, even if the use of permanent flushing jet effect of high-pressure flushing, in the discharge water - there is no difficult chemical reagent, it is also easier to treat. In contrast, physical cleaning has less pollution to the environment and less damage to the health of workers, and physical cleaning has no corrosive damage to the substrate

No chemical cleaning agent is needed; There is no need to shut down the boiler for cleaning, but to carry out natural cleaning in the normal use of the boiler; The effect of scale removal reaches and exceeds that of chemical cleaning

some "dead corners" which are difficult to be removed by chemical cleaning can be removed by physical cleaning; Without any chemical cleaning agent, the metal surface of the boiler will not be eroded by corrosive substances, which can extend the service life of the boiler; In the process of cleaning, there is no need to wash with a lot of water, and no cleaning wastewater is discharged, which will not pollute the environment; Cleaning personnel will not affect their health ring operation; The cost of cleaning is low, there is almost no other cost except equipment and operators, and the equipment can be used continuously for many times

Application

it mainly cleans all kinds of tubular heat exchanger, double effect absorption lithium bromide refrigerator, vertical and horizontal condenser, air preheater, rewaterer, st collector, evaporator, reactor, boiler, tank, container and heating device; All kinds of water pipelines, instrial water pipelines, oil pipelines and two-phase flow pipelines, sewage pipelines

economic benefit

physical cleaning method will bring huge economic benefits to boiler cleaning:

first, rece cleaning costs

Secondly, the cost of sewage treatment was reced

Thirdly, the benefit of increasing proction is very considerable e to non-stop cleaning

Fourthly, ring the cleaning process, the thermal efficiency of the boiler is improved and the fuel is saved; This small stream of water, like a small bullet, has great impact energy. Physical cleaning can carry out steel plate cutting, casting sand cleaning, metal derusting, and can also remove salt, alkali, scale and all kinds of blockage on the inner wall of the pipe. High pressure water jet cleaning is to use the water flow with great energy for cleaning

reference source : network physical cleaning

4. The winter of blockchain is coming, and the coin circle is cold. People who still stay in this place are sticking to their faith! For example, the currency exchange launched new activities, BHT launched new activities, and still insisted on doing activities for the market!

5. There are coin collectors there

6. Hello
the quota needs to be increased by buying
give it a try, buy one and sell 1.7
I haven't played for a long time, I don't know if it's 1:1.7 now
anyway, you must buy to get the quota
hope to adopt!

7.

As shown in the figure,

< p class = "ikqb_ image_ Because the function curve y = cos X - cos | x | is an axisymmetric graph rather than a centrosymmetric graph,

it has an axis of symmetry x = K π/ 2, but there is no center of symmetry. Where k ∈ Z

8. What is MSD
sql is the abbreviation of database query

large databases include IBM DB2 Oracle Sybase

medium databases include Microsoft SQL Server 2000 / 2005 / 2008

small databases include MySQL PostgreSQL

non relational Microsoft Office Access

banks use large databases, websites use medium and small databases, and small software use non relational databases

9. Telephone customer service, QQ, all false, this fraud company no supervision, unscrupulous!

10. In the field of elementary mathematics, the word neighborhood has its specific meaning
any open interval centered on a is called the neighborhood of point a, denoted as n (a)
Set δ Is any positive number, then open the interval (a)- δ, a+ δ) It is a neighborhood of point a, which is called the neighborhood of point a δ Neighborhood. N (a, δ)， N (a, δ)={ x|a- δ & lt; x < a+ δ}

center and radius
point a is called the center of the neighborhood, δ It's called the radius of the neighborhood<

de centrated neighborhood δ When the center a is removed from the neighborhood, it is called point a. the expression method is to mark a small 0 on U. Sometimes the open interval (a- δ, a) The left side of a is called a δ Neighborhood, the open interval (a, a)+ δ) The right side of a is called a δ Neighborhood
by definition, we know what the domain is
[then according to the characteristics of absolute value, we can know that the absolute value of any number is greater than or equal to 0
to remove the centroid neighborhood is to exclude the condition of 0, so the absolute value of the de centroid neighborhood is greater than 0
you think of the neighborhood as a space, similar to the principle of limit, space you can infinitely approach to 0, but when you approach the center point, when the center point exists, the space is 0 when it approaches and coincides with the center point, but when the center point does not exist, you cannot approach and coincide with the center point, so the space is always greater than 0.