4-bromo-2-iodopyridine

The utensils involved in "Tiangong Kaiwu" have different uses. Taking agricultural implements as an example, the use of the scorpion is to cultivate the land deeply, break the soil and open ridges, and serve as the foundation for sowing and raising seedlings. Farmers hold this, and work hard in the fields, so that the land can be loosened, which is conducive to the growth of seeds and seedlings, and is related to the harvest of food for the common people.
Textile appliances, such as spinning wheels and looms, have the function of turning silk and linen and other fibrous materials into cloth through the process of pulling strands and interweaving. This is the key to people's clothing, from folk home-style clothing to rich families, all depend on this. In terms of social economy, the prosperity of the textile industry can promote the circulation of trade and increase the national tax.
Metallurgical casting tools, such as furnaces, casting molds, etc., are used to melt and cast metals and create various utensils. The objects made, or as weapons, are used in national defense and military, to defend the country and defend the country against foreign invasion; or as household utensils, such as pots and kettles, for daily cooking and eating.
Pottery making tools, which can shape and fire clay into jars, jars and jars. It can be used to store water and grain, in folk life, to ensure the storage of materials; it can also be used for exquisite porcelain, which can be used for ornamental collection, to highlight the level of craftsmanship, and to promote cultural exchanges and dissemination.
The system of boats and trucks, or to carry people through rivers, lakes and seas, to facilitate transportation; or to transport goods and trade, to prosper the economy. Driving on land is also convenient for the transportation of people and goods.
To sum up, the utensils recorded in "Tiangong Kaiwu" are widely used in agricultural production, clothing, food, housing and transportation, military and national defense, commercial and trade circulation, etc., and play a crucial role in national economy, people's livelihood and social development.

4-2-The synthesis method of a well includes casting, digging, and building.
The method of casting a well, select fine iron, melt it with fire, and make the iron juice flow like silver, and pour it into the well mold. The mold is made of stone, the shape is regular and the wall is slippery, and the iron juice is full. When it is condensed and the mold is removed, the iron trap will be formed. This well is exceptionally strong, and it is difficult to hurt with knives and axes, and it can be trapped by powerful beasts.
The method of digging a well, choose the ground and dig on the main road or the road the enemy has passed. First, use a rope to determine its radius, and dig the soil as a pit, which is more than ten feet deep and several feet wide. When digging, strive to make the walls straight and flat at the bottom, so that the soil around the pit can be transported to other places, so that no traces can be exposed. After digging, the bottom of the well is covered with sharp wood and sharp blades, and the mouth of the well is covered with straw mats and thin soil, disguised as the original. Pedestrians and enemies do not notice, and if they step in, they will sink.
The method of building a well is to use masonry as material. Where the terrain is brief, first build the wall of the well, and the masonry is staggered and bonded with mortar to ensure that it is firm. The wall is formed, and then the bottom of the well is laid, and it is also densely built with masonry. The trap may be placed in a trap, or poisoned, and the mouth of the well is covered with a trapboard and decorated with
These three synthesis methods each have their own strengths, and they are used according to time, place, and potential to achieve the purpose of setting traps to guard against enemies and trapping beasts.

4. 2 The object, its physical reason can be studied. This object is made of special materials, which are difficult to build on the ground, resistant to high temperatures and corrosion. The outer surface of the vessel is like the meaning of the harmony of heaven and earth. The thickness of the wall of the vessel is uniform, which can protect the preservation of the parts.
Its material is made of a variety of rare and rare objects, and it has extraordinary characteristics. Its resistance is excellent. When it is roasted in a hot fire, it will not be molten or melted. It can preserve its shape and preserve the well-preserved things. This characteristic makes it very beneficial in alchemy, manufacturing, etc., and can be used to support high temperatures without breaking.
Furthermore, its anti-corrosion is also amazing. If it is placed in a humid place or in a difficult place, it will not be affected at all. These characteristics make it suitable for the preservation of rare and perishable things, which are new for a long time and will not be invaded by the moon.
It also has its integrity and high resistance, but it is not strong. It can be damaged, and it will not be cold, so that the parts can be treated smoothly, which can ensure that its essence will not dissipate.
The ground is hard, and it is not brittle and easy to break. If it is hit by external forces, it can be unloaded and not easily broken. Occasionally, it can also be repaired by special methods to restore integrity.
Therefore, with its excellent physicality, the 4-2 device can play an important role in all kinds of work, and it is also a good tool to obtain.

The price of the four things in the city of Guanfu is constantly changing and difficult to determine. As for the money of four baht and the money of two baht, the price of the market also varies according to the situation and the difference in supply and demand.
The value of the ancient money and goods is not determined solely by the baht. When the husband is in a peaceful world, the government is in harmony with people, all industries are prosperous, and the city has no stagnant goods, the value of the money, or according to the workmanship of the casting and the law set by the court, is relatively stable. If the money of four baht is more valuable than the money of two baht because it contains relatively more copper, or is trusted by everyone in the transaction.
However, things are impermanent. If there is a disaster in the army, or famine at the age of age, people's livelihood is difficult, and goods are scarce. At this time, the value of money is not respected by the baht. Or light goods are easy to obtain, but the value of money falls. The money of four baht and two baht changes with the changes in the market. Although the four baht is important, but everyone is eager to seek food and things, or both are cheap, it is difficult to distinguish between the good and the bad.
And if the merchants manipulate and hoard, the price of money and goods is also chaotic. Or see the money of two baht, because it is light and conducive to circulation, and the merchants chase after it, causing its price to rise; the money of four baht, because it is heavy and inconvenient to trade, the price may be slightly lower.
And the customs and conditions of different places are different, and the circulation and value of currency are also different. The people of A land, or the money weighing four baht, think it is solid and can be relied on; the people of B land, or the money of two baht, are easy to carry and trade. If you want to know the market price of four baht and two baht money, you must check the chaos at that time, the rich apology of the year, the attitude of businesspeople, and the customs of the place, and comprehensively consider, you can get a general idea, but it is difficult to have a certain rule.

During storage and transportation, there are many things to pay attention to when it comes to four baht and two baht.
When storing, the first priority is the environment. Choose a dry place to avoid moisture. If the coin is left in a humid place, it will rust easily and damage its appearance and value for a long time. "Tiangong Kaiwu" says: "The survival of things depends on the environment." The same is true for coins. A dry environment can keep them from being damaged for a long time. And it needs to be placed in a safe place to prevent people from stealing. After all, these are all valuable things.
When transporting, packaging is crucial. Coins should be wrapped in soft objects, such as cloth, to prevent them from colliding with each other and causing surface wear. During transportation, the traffic should also be steady and not too bumpy. If the journey is long, you should always pay attention to check whether the coins are damaged.
Furthermore, whether it is storage or transportation, you must do a good job of counting and recording. Remember the number of coins in detail so that you can know the amount at any time, and record the time and place of storage and transportation. If there is any problem in the future, you can also check the evidence.
In addition, it is also necessary to prevent natural and man-made disasters. In case of natural disasters such as rainstorms and floods, you should transfer the coins in time to avoid being soaked in water; in case of war, banditry and other man-made disasters, you should also have countermeasures to protect the coins. Overall, during the storage and transportation of four baht and two baht, it is necessary to consider all aspects and treat them with caution to ensure their safety and integrity.