5-bromo-2-iodopyridine

In "Tiangong Kaiwu", the "5-pulp-2-kettle" is mainly used for salt production.
In the method of salt production, this "5-pulp-2-kettle" plays a crucial role. The brine containing salt is first introduced into the "5-pulp". This "pulp" is the place where the brine is initially treated. The brine in the "pulp" can remove some impurities and make the brine more pure. The brine treated by the "pulp" is then moved to the "2-kettle". The "kettle" is the key device for boiling salt. In the "kettle", the brine is boiled over fire, and as the water evaporates, the salt gradually crystallizes and precipitates, and finally the salt is obtained.
The setting of "5-pulp" can be analogous to the screening process, which pre-separates impurities in the brine that are not suitable for salt formation or affect the salt quality. The function of "2-kettle" is like the place of production. With the control of the heat, the brine completes the transformation from liquid to solid salt. The combination of the two constitutes a complete salt production process.
Salt production is related to people's livelihood. Salt is an indispensable thing for dietary seasoning, and it is also an important raw material for many industries. The method of "5-pulp-2-kettle" recorded in "Tiangong Kaiwu" shows the exquisite salt production process at that time. Through this setting and operation, the output and quality of salt can be improved, and the daily needs of the people and the needs of social production for salt can be met.

5-Welding-2-tenon and tenon are generally combined, as described below.
One of them is the shoulder tenon. This method of tenon and tenon is used for the combination of square materials. One end of the material is made of half tenon, and the other material is made of half tenon, so that the half tenon is embedded in the mortise, like holding hands, hence the name. This tenon is firm and strong, often in the corner of the table. It can withstand a large vertical and horizontal force, so that the utensils are fixed.
Second, dovetail. Its shape is like the tail of a swallow, one end is broken, and one end is narrow. In the manufacturing process, the end of one material is formed into a dovetail-shaped tenon, and the other material is formed into a matching dovetail-shaped mortise. The dovetail is tightly occluded and has good tensile properties. It is mostly used in the combination of box pumping, box, etc., which can effectively prevent the plate from splitting and increase the durability of the utensils.
Third, the grid shoulder tenon. This tenon and tenon need to be used for the tenon and tenon eyes, which are all processed into bevels at a certain angle, and the grid shoulder. The grid shoulder tenon is divided into large grid shoulders and small grid shoulders, large grid shoulders and small grid shoulders. It is often used in the transfer of furniture materials, such as the joint of chairs and columns, which not only has a beautiful effect, but also can improve the quality of the chair.
Fourth, rice dumpling mortise. The three square materials are joined together, and more rice dumpling mortise is used. The eyes of the three materials are all at a 45-degree angle and bite each other, and the shape is just like the corner of the rice dumpling, hence the name rice dumpling mortise. The rice dumpling mortise is exquisite, so that the corner shape of the utensil is completely different, and it has good support force. It is mostly used in furniture with cubic shape.
Fifth, the shoulder tenon. In the connection between the legs and the teeth plate, the upper end of the legs and feet is made to make a slanted shoulder, and the tooth plate is also made to fit the slanted mouth. The tenon is inserted into the eye of the tongue, and the slanted shoulder and the slanted mouth are tightly closed, which increases the firmness of the slanting. Shoulder tenons are mostly used in waist-tied furniture to make the lower part of the utensil solid and beautiful.
All these methods of tenon and mortise are the crystals of the wisdom of ancient craftsmen. They are used in the creation of the utensils described in "Tiangong".

5% 2% of its physical properties are excellent, and this product is based on a special formula, which contains many characteristics worth exploring.
Its density is slightly heavier than that of ordinary products. This is due to the addition of special materials to the formula, which increases the overall weight. In this way, in the process, it can improve the quality of the product by means of external factors such as greater performance and less resistance, and is more accurate.
As for hardness, 5% 2% also has an excellent performance. The special smelting technology of the outer layer, the hardness phase is high, and it cannot effectively resist the outer layer, avoid the possible damage during the storage process, and at the moment, it can withstand the high temperature, ensure the high efficiency of the gun, and prevent the explosion and other hazards.
Furthermore, 5% 2% 2% 2% has good corrosion resistance. Due to the clever integration of the chemical components and the surface protection, the surface can still maintain the performance of the product, such as high humidity and high temperature, which greatly extends the storage period of the product and reduces the cost.
5% 2

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When storing things, it is the first place to store them. It is necessary to choose a high and dry place to prevent moisture and rot. And the place should be sturdy, which can withstand the damage of wind, rain, insects and rats. If the storage place is not good, the things are easily damaged, and there are deficiencies in use.
Secondly, the hidden things should be classified and placed. The same kind of gathers together, orderly, and easy to find and use. If it is messy and temporary to find things, it may be time-consuming and laborious, and delay the opportunity.
Furthermore, the responsibility of protection should not be ignored. When there is a special person to guard, regular inspections should be made to prevent theft and loss. If there is no strict protection, the property may be stolen by others, resulting in losses.
As for the transportation journey, you must first choose a good time. Avoid torrential rain and strong winds, severe cold and heat days, so as not to be damaged by bad weather. And the choice of road is also the key. It is advisable to choose a smooth and stable road. If the road is difficult to travel, the goods will be easily damaged by bumps.
The equipment for transportation should also be of good quality. The axles of the car need to be strong, and the bilge of the ship needs to be tight for transportation. If the equipment is not good, it is easy to cause accidents on the way, resulting in damage.
The choice of the transporter should not be careless. Use someone who is diligent and reliable. If people are lazy and negligent, or have an accident. And when transporting, you should handle it with care and do not treat the goods rudely.
All these things must be paid attention to when hiding and transporting. A little carelessness can make mistakes and cannot be ignored.

There are five baht and two coins today, what is the market price? The five baht coin was cast by Emperor Wu of Han, which is as heavy as its text, has a regular shape and excellent material. It is a common currency in the Han Dynasty and later generations. Because of its exquisite casting and standard weight, it is widely circulated in the market and has a good reputation. Its value often varies from time to time and place, but it is roughly determined by the copper it contains and the economic situation and currency supply and demand at that time.
As for the two baht coin, it is either a small coin for weight reduction or a specific period. If the material and craftsmanship are good, and it is rare in the world, its price is not cheap; if it is shoddily made or there are many in the world, it is slightly less valuable.
During the Han Dynasty, the five-baht money was officially cast as positive, and its value was relatively stable. According to historical records and later archaeological inferences, in the peaceful and prosperous times, when the economy was prosperous, the purchasing power of the five-baht money was quite strong, and a five-baht money could be easily counted for liters, or purchased for several feet of cloth. And if the two-baht money is officially cast, its price may be about half of the five-baht money; if it is privately cast small money, the quality is inferior, the value is even lower, or only thirty-four percent of the five-baht money.
However, the market price is fickle, and it is also affected by many factors such as war, famine, inflation, etc. In times of chaos, lack of materials, and currency devaluation, the prices of the five-baht money and the two-baht money may Therefore, in order to know the exact market price, it is necessary to examine the specific situation at that time in detail before making a conclusion.