3 thoughts on “Is there a sound on the ground?”

  1. some.
    The hard gold is called 3D hard gold.
    3D hard gold "3D" is the abbreviation of Three-, which means three-dimensional graphics. The real three -dimensional space has a real distance.
    is also gold. The new generation of 3D hard gold adopts different processes in different locations.
    The color layers are clearer, more three -dimensional, and the texture is also distinguished. When you touch it, some places are smooth and delicate. Some places have a slight matte feeling and rich feel.
    "3D hard gold" jewelry is a new product that breaks the manufacture of traditional craftsmanship. It is mainly produced in the "cast" model. It is mainly improved by the gold content, pH value, working temperature, organic optical agent content and stirring speed in the casting solution.
    has greatly improved the hardness and abrasion resistance of gold, thereby solving the lack of gold jewelry of the existing power casting process, such as: we must not wear and touch.

  2. Some
    It hard gold refers to [1] physical gold, but it is "hard" gold made by new methods. Its texture teaches ordinary gold. Also known as "thousands of hard gold". [1] 0.005%is added with special metals to increase the hardness, thereby achieving the corresponding hardness.

    In collision, there will be vibration
    vibration generates sound waves
    sound waves pass through the air to the ear

    The more crisp
    is like a steel tick falling to the ground

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