4-pyridine phenol

4-It is soft and heavy in nature, and white and shiny in color. Its melting is like a stream of water, soft and malleable, and can be shipped. It melts in case of fire, coagulates in case of water, and likes to dry and shine.
4-It is soft and soft in nature, but its weight is heavy, and its color is white, and it shines brightly. Add to the melting of water, it is like a liquid flow, malleable, and can be turned into a kind of utensils.
In case of fire, it is easy to melt into a liquid, and it coagulates quickly in case of water. Its nature likes the dry environment, and it is the tide. Due to its chemical properties, it is easy to be invaded and transformed in a humid place, such as the formation of carbonate and other substances, which affects its original properties.
And its chemical activity is determined, it is not easy to react to the biochemical reactions of most common substances. However, under specific conditions, such as acids, chemicals, etc., it will also be reversed. This is all unique to the chemical properties of others.

The so-called physical properties of his uncle cover many aspects. The quality of his body shape, whether solid or flexible, is related to the state of his physique. Solid, like the quality of gold and stone, can be said to be healthy in body shape, strong in muscles and bones, able to bear weight in work and not easy to get tired. Flexible, like the posture of a willow, although weak but able to adapt to changes, agile, or able to ingenious in technical operations and other things.
Furthermore, the quality of his temperament. Or gentle and mellow, like the warm sun of spring, making people close to each other, getting along with it, like the spring breeze, his words and deeds can be gentle and soothing, and he can have a harmonious relationship inside and outside the family, which is popular with everyone. Or upright, if the towering mountain, upholds the right path, has rules in words and deeds, does not go with the flow, encounters right and wrong, can discern and adhere to justice, and sets an example for the family.
It also has the quality of thinking. Or sharp and intelligent, like a shining star, who can see into all things, and can quickly find solutions to problems. In agriculture, livelihood, etc., he can have unique insights and lead the family to make progress. Or calm and serious, like a deep abyss, thinking thoughtfully, not acting rashly, and planning can move forward steadily to ensure that all things in the family go smoothly.
The quality of his style of doing things, or diligent and unremitting, such as an old man, working all day long, busy for the family's prosperity, and working tirelessly. Or open-minded and casual, if idle clouds and wild cranes, do not stick to mundane affairs, live freely and casually, make the family atmosphere relaxed and happy, and can also find a way to be at ease in difficulties. These many physical properties constitute the unique person of his uncle, and play different influences and roles in the family.

I look at the world, and the ability of Tiangang creation involves a wide range of fields, and it has extraordinary uses.
In the field of agriculture, Tiangang creation helps a lot. In the past, farming relied heavily on human and animal strength, which was difficult and ineffective. However, Tiangang creation has ingenious tools that can replace human labor. Its cultivator is sharp and strong, and it enters the soil like mud. It is easy to cultivate deep, making the field loose and fertile, which is conducive to seed germination and root system stretching. Irrigation tools are also exquisite, which can lead canal water to distant fields, evenly sprinkle them, keep the seedlings moist, and worry-free in droughts and floods. Farmers use it to save time and effort, and the crops are abundant and the warehouses are full.
In the world of construction, Tiangang creation also shows supernatural powers. The materials and tools used to build the city walls and repair the palace rooms are very exquisite. The bricks and stones are fired, the heat is precise, and the texture is strong, which can be eroded over time without being destroyed. Raise high-rise buildings and bridges, and the equipment used can lift boulders and weight beams, and settle in their place. The craftsmen use the ingenuity of Tiangang to build magnificent buildings, cornice bucket arches, carved beams and paintings, all of which have become wonders in the world, solid and beautiful, and lasting for a long time.
On the road of military affairs, Tiangang's creations are extraordinary. The weapons are sharp, the blades of the swords are flickering with cold light, and they are cut like mud; the bows and crossbows are exquisite, and the range is long, and the arrows and stones are like rain, which makes the enemy terrified. The armor is tough, which can resist knives, guns and arrows, and protect the bodies And marching in the army, there are guides and tools, and they are not fascinated by mountains and rivers; siege and defend the city, there are all kinds of battle tools, which are amazing. With this sharp weapon, the combat power of the army is greatly increased, and the peace of the family and the country is guaranteed.
In the daily life of the people, Tiangang creation is also closely related. Textile tools make silk and linen into cloth, fast and exquisite, and the people can get warm clothes. Cooking utensils, easy to control the fire, delicious food, can be cooked. Boat trips are in rivers, lakes and seas, convenient transportation, smooth flow of goods, and prosperous commerce and trade.
Tiangang creation is of great use in agriculture, construction, military, and people's livelihood. It is used for the well-being of all people in the world, and makes all things in the world prosperous because of it.

If you want to make a crossbow, you need to follow the ancient method and make it carefully. The first choice of materials is good material, which is the foundation of the crossbow. For the body of the crossbow, you should choose tough and elastic wood, such as zhe wood and mulberry wood. These woods are dense in texture and can withstand the tension of a strong bow without breaking. The wood must be air-dried over time to remove moisture to prevent future deformation.
The material of the bow string is preferably beef tendon. The beef tendon is tough and has good toughness, and can be used for a long time without breaking. After taking the beef tendon, it needs to be carefully processed, first soaked in oil, until it is soft, and then repeatedly beaten to make the fibers tight and strengthen the tensile force.
When making a crossbow, make the bow arm first. According to the size and purpose of the bow and crossbow made, the length, width and thickness of the bow arm are determined. The craftsman uses exquisite skills to carefully carve the selected wood so that its shape conforms to the principle of crossbow force. Both sides of the bow arm must be polished smoothly to prevent the string from hanging or affecting the flight of the arrow.
Then install the string. The processed beef tendon string will be accurately installed at both ends of the bow arm. The tightness of the string is extremely critical. If it is too loose, it will be weak, and if it is too tight, it will be easy to break. The craftsman uses experience and feel to adjust the tension of the string until the force of the crossbow is just right.
The crossbow machine is a key component of the crossbow, which is related to the accuracy of firing and power control. The crossbow machine should be made of fine iron to cast and shape. Its internal organs, such as teeth, hanging knives, lookout mountains, etc., all need to be finely processed, and the size must not be wrong. After the components are assembled, they need to be flexible and smooth, so that the crossbow can be fired smoothly and the arrows can hit accurately.
After being made, it is still necessary to test-shoot and adjust. Test-fire different arrows at different distances to observe their flight trajectories and landing point deviations. According to the test results, fine-tune the strings of the crossbow, crossbow machine and other components until the performance of the crossbow reaches the best. In this way, a sophisticated crossbow can be calculated and made, which can be a sharp weapon for combat and hunting.

The method of using utensils should be carefully used at the beginning, the hardness of the material should be observed, and the shape should be judged. These two are related to the longevity and convenience of using utensils.
If we take the "Tiangong Kaiwu" as an example, when mining iron, we need to distinguish the advantages and disadvantages of its ore veins. When the ore is good, the iron essence must be distinguished, and the utensils must be tough. When smelting iron, it is crucial to master the heat. If the fire is fierce, the iron is easy to melt and pure or sparse, and if the fire is small, the iron is difficult to melt and the nature is not pure. Only with a moderate fire can the molten iron be uniform before the tool can be cast.
When casting the tool, the system of the model must be refined. If the model is regular, the tool will be formed correctly. And the sand and mud of the casting should also be selected with fine and suitable viscosity, otherwise the casting will be prone to trachoma and bubbles.
The utensils are ready, and when they are used, they should also know how to maintain them. Such as iron utensils, wipe them clean after use, and do not allow water stains to remain to prevent rust. If they are not used for a long time, they should be wrapped in oil and placed in a dry place. And the utensils should not exceed their ability, and overload them, otherwise they will be easily damaged.
Furthermore, the user of the utensils should have a heart of awe. Every utensil gathers the blood of the craftsman and consumes time and materials. Do not spoil them slowly, but cherish and care them. In this way, the life of the utensils will be extended, and they can also be passed on to future generations, so that future generations can enjoy the crystallization of the wisdom of the predecessors, and This is an important thing that cannot be ignored in the process of using the device.