1. The first is the inherent quality of the piano itself. When it comes to the quality of pianos, one has to talk about the brand of pianos. Generally speaking, if a piano of a better brand, due to its advanced craftsmanship and superb technology, especially the material selection strictly conforms to international standards, the stability of the pianos it produces It will also be relatively better. If it is a miscellaneous piano, its stability will definitely be worse. If the stability is not good, you must often adjust it.
The stability of the piano, the change of piano pitch is determined by the inherent properties of its structure and materials, it is inevitable. The piano has more than 200 strings, which are tensioned by the pegs, pegs and iron bones, and the total tension of the strings Nearly 20 tons. The strings are pressed on the dome-shaped soundboard through the piano code, and the tension of more than 10 tons will inevitably cause corresponding deformation on the piano. Among them, the deformation of the soundboard has the greatest impact on the pitch. Before the piano leaves the factory, it usually goes through 4-8 times. The dialing and tuning is used to counteract this distortion.
Thirdly, the leaves of these green dills with excellent growth tend to be crisp and green, and they look glowing, probably because you have to irrigate the main stems with the culture solution on time. If you don't have a deep grasp of these aspects and don't know what to choose, you can fully refer to some expert methods to make liquid fertilizer by yourself, the actual effect is also very good.
Luluo has just moved home for a few days, and has withered and faded. What should I do? In addition, potted green plants such as dillus sylvestris have strong air filtration capabilities. After a long feeding time, the leaf holes on the surface of the leaves will be blocked by the dust of large particles, so that the main stem of the pot will give People feel misty. In this case, the best solution is to find a clean wet towel and gently scrub the surface of the leaves, paying attention to the extent not to be too large to prevent damage to the main stem.
In the end, I strongly recommend a better maintenance tip to everyone. The diluent of the wine is mixed into a solution and then sprayed with the leaves of the green radish on time, so that the main stem can continue to remain crisp and green.
Flowers feel that if green plants actually have very good air filtering capabilities, and the spread of green sills can reasonably digest and absorb, to remove the rumors that harmful ingredients such as indoor formaldehyde in newly decorated houses, although it is a bit bigger The work ability of the stem, but with the eloquent service tenet, indoor cultivation of green dill has many benefits. There are pot friends who raise them at home, but they must take good care of them so as not to waste their working ability.
2. The internal stress of the various materials used in the newly produced piano will be relatively larger (here mainly refers to the piano body, strings, and steel plates. These main components have been artificially aged and natural aging treated during the production process), As time goes on, the internal stress of each part of the piano will slowly be released so that the stability of the piano becomes more and more stable. This is the reason why older pianos are always more stable than new ones.
3. In the process of piano performance, the action machine has to repeatedly strike the strings. The strings are impacted by external force and the internal stress of the material itself will naturally increase the tendency of changes in pitch. The piano will be used for a period of time. Later, the piano's action mechanism has undergone thousands of actions, and some parts that are easy to wear are worn to varying degrees, resulting in the stroke ratio and coordination of the action mechanism, resulting in poor touch, and changes in temperature and humidity can also cause the piano to fail. Some parts are not working well, so the piano needs to be adjusted at the same time as it is tuned regularly.
4. If the piano has been transported over long distances or moved frequently, it will also cause changes in pitch.
5. Due to the viscoelasticity of wood (like good dough, it is both elastic and has the property of deforming over time), the deformation of the soundboard occurs slowly over time. Although this kind of deformation caused by wood viscoelasticity is extremely slow, its influence on pitch is still obvious. Therefore, the piano has to be tuned to offset this deformation from being made to scrap. In addition, the piano strings have the ductility of metal. , Under long-term continuous great tension, it will be extended and deformed, resulting in a decrease in pitch, which is also a reason for the change of piano pitch.
Thirdly, the leaves of these green dills with excellent growth tend to be crisp and green, and they look glowing, probably because you have to irrigate the main stems with the culture solution on time. If you don't have a deep grasp of these aspects and don't know what to choose, you can fully refer to some expert methods to make liquid fertilizer by yourself, the actual effect is also very good.
Luluo has just moved home for a few days, and has withered and faded. What should I do? In addition, potted green plants such as dillus sylvestris have strong air filtration capabilities. After a long feeding time, the leaf holes on the surface of the leaves will be blocked by the dust of large particles, so that the main stem of the pot will give People feel misty. In this case, the best solution is to find a clean wet towel and gently scrub the surface of the leaves, paying attention to the extent not to be too large to prevent damage to the main stem.
In the end, I strongly recommend a better maintenance tip to everyone. The diluent of the wine is mixed into a solution and then sprayed with the leaves of the green radish on time, so that the main stem can continue to remain crisp and green.
Flowers feel that if green plants actually have very good air filtering capabilities, and the spread of green sills can reasonably digest and absorb, to remove the rumors that harmful ingredients such as indoor formaldehyde in newly decorated houses, although it is a bit bigger The work ability of the stem, but with the eloquent service tenet, indoor cultivation of green dill has many benefits. There are pot friends who raise them at home, but they must take good care of them so as not to waste their working ability.