Imidazole, 2,4,5-triiodo-

Crossbow arrows, two, four, five - three-arrow generation - what is their main use? This question is related to the use of ancient weapons.
Crossbow arrows, in ancient battle formations, have a wide range of uses. The continuous firing of two, four or even five arrows, the so-called "three-arrow generation", is a special design of crossbow equipment. Its primary use is to enhance the killing power. On the battlefield, although the single-shot crossbow arrows have a certain degree of lethality, the design of continuous firing can project more arrows to the enemy in a short period of time, making it difficult for the enemy to evade, thus effectively expanding the lethal range and increasing the probability of hitting the enemy.
Furthermore, the design of the "three-arrow generation" also helps to disrupt the enemy's formation. When multiple arrows are fired in unison, the enemy needs to be distracted and cannot focus on the original combat deployment, and the formation is prone to chaos. In this chaotic opportunity, we can take advantage of the momentum to attack and take the initiative in the battle.
At the same time, from a tactical point of view, the continuous firing of crossbow arrows can form a deterrent force. When the enemy sees this dense rain of arrows, they are afraid and their morale will be frustrated. Even if they are not directly hit, the fear will affect their will to fight and play.
When attacking the city, the crossbow arrows of the "three-arrow generation" can pose a huge threat to the defenders on the city wall. Condescending defenders have a certain defensive advantage. However, the continuous firing of crossbow arrows can cross the city wall and hit key positions such as the command system and material storage behind them, weakening the enemy's defense power.
In a field encounter or ambush, the continuous firing of crossbow arrows can give the enemy a heavy blow in an instant, enabling us to quickly seize the initiative on the battlefield and lay the foundation for subsequent victory in the battle.

Crossbows, two, four, and five things are ancient sharp weapons, each with its own physical properties. Crossbows are made of wood, bamboo, tendons, horns, etc. Their nature lies in the use of elasticity to send arrows. The body of the bow needs to be tough and elastic, and the strings need to be strong and durable. When the bow is launched, the bow body accumulates energy, and the elastic force of the strings is suddenly issued. The arrow is shot out quickly. The size of its force is related to the strength of the bow, the material and relaxation of the strings.
The two, although they are not explicitly stated, may be paired instruments, and their properties should be symmetrical and matched. Or assist each other, or cooperate with each other to play an effect in specific things. < Br >
The four are also not specified in detail. However, in common sense, it may have the shape of four sides and four sides, and has the physical characteristics of stability and balance. For example, the ancient four-legged device is stable and can bear load. The stability of its structure depends on the uniform distribution and solidity of the four legs.
The five, or related to the five elements, have the nature of mutual generation, mutual restraint and cyclic change. Or a pentagonal object, the relationship between its angles and edges determines its stability and unique mechanical properties.
This crossbow and the two, four, and five items were important tools for battle formation and hunting in ancient times. Although the two, four, and five items are not detailed, they must have their own uses in various aspects such as craftsmanship, construction, and daily use. Their physical properties affect their functions and effectiveness. They are all the embodiment of the wisdom of the ancients, and they were of great significance in production and life at that time.

The chemical properties of saltpeter, two, four, five - three nitrate generation - are: it is easy to decompose when heated, and a large amount of gas will be produced when decomposing, which makes it explosive potential. At room temperature, it is relatively stable and generally does not react quickly with common substances. However, under certain conditions, such as high temperature and contact with strong oxidants, violent reactions will occur.
Saltpeter mainly contains potassium nitrate, and the three nitrate generation contains multiple nitro groups. Nitro has strong oxidizing properties, giving the substance active chemical properties. In case of reducing agents, oxidation and reduction reactions can occur, releasing a lot of energy. And such compounds are sensitive to friction and impact, and slight external effects may trigger reactions, causing explosion hazard.
Due to its lively chemical properties, it is widely used in industrial, military and other fields. In the past, gunpowder containing such ingredients was often used as a propellant or explosive for weapons and ammunition in wars. Today, despite technological progress, new explosives and energy materials have emerged, and nitrate-related nitrate compounds containing saltpeter still play an important role in the manufacture of specific ammunition and some fireworks. However, due to its danger, production, storage and use must strictly follow safety procedures to prevent accidents.

If you want to make a bow and crossbow, there are two, four, and five ways to combine them. The ancient good workers each have their own way. Let me describe one or two of them.
The first thing to do in the system of a bow and crossbow is to choose materials. The second is to look for tough materials as the bow arm. Those who are good in ancient times are often made of zhe wood and mulberry wood. These two woods are tough, elastic, and can store strong power. When choosing materials, you must choose those with straight texture, no joints and no cracks, so as to preserve the quality of the bow and crossbow.
The fourth is related to the string of the bow and crossbow. String players, the transmission of power, must be selected. In the past, beef tendons and silk were mostly used for it. The beef tendon is made of its toughness, and the silk is made of its flexibility and durability. The method of making strings is to first soak the beef tendon or silk to make it soft, and then repeatedly twist it to make it tight. When twisting, the force is uniform, so that the string can be stressed uniformly, and the arrow shot can be stable.
As for the five, they are the crossbow machine. The crossbow machine is also the machine center for controlling the arrow. Its production needs to be exquisite, and it is mostly cast in bronze. When casting, the mastery of the heat is the key. If the heat is too high, the copper will be brittle; if the heat is insufficient, the crossbow machine will not be strong. After casting, it is finely polished to make the parts fit seamlessly. Teeth, cantilever knives, lookout mountains and other components all need to be precisely sized and easy to operate, so that when they are pulled, the arrow can be sent quickly and hit the target.
And the combination of the bow and crossbow not only needs to be sophisticated in each component, but also has a wonderful combination. The connection between the bow arm and the crossbow machine must be stable and fit, so that the force can be transmitted smoothly. The installation of the string is moderately elastic. If it is tight, the bow will be easy to fold, and if it is loose, the arrow will be weak. All kinds of links complement each other and are indispensable. Only by carefully selecting materials, being skilled in production, and being detailed in combination can you get a good crossbow, which can play its function when shooting and fighting.

In today's market, there is something called spicy strips. How much is the price? Spicy strips are made of soybean flour, flour, etc., seasoned and made. They taste spicy and fragrant. Everyone loves them, especially children.
Looking at various cities, the price of spicy strips varies depending on the product, quantity, and brand. Common, small bags of spicy strips weigh about 20 to 50 grams, and their price may be one to three yuan. Such small bags are convenient for children to buy food. After class, they can often be seen holding spicy strips and feasting on them.
If it is a large package, it can weigh up to hundreds of grams or even hundreds of grams, and the price is about five to ten yuan. This kind of packaging, or for multiple people to eat together, or to eat multiple meals by themselves, is quite suitable for family gatherings and outings.
As for the brand of spicy strips, the price may be slightly higher due to the fine selection of materials, good craftsmanship, and good reputation. However, it is only a few yuan, and it is not beyond the range of ordinary people.
There are also gift boxes, which contain more spicy strips, which are beautifully packaged, or as gifts. The price ranges from 20 yuan to 50 yuan.
Basically speaking, the price of spicy strips in the market is between one yuan and 50 yuan, and each can get what they need. Everyone in the city can choose and buy according to their own preferences and abilities to enjoy this unique taste.