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Drilling machines are indispensable tools across various industries, including construction, mining, and manufacturing. Their primary function is to create precise holes in various materials, from wood and metal to concrete and stone. As the demand for advanced drilling technology increases, understanding the pricing of these machines becomes critical for businesses looking to invest in equipment that meets their operational needs. This article explores the factors that influence the price of drilling machines and their overall value.


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It is important to know that the shape of the sand has an important impact on the surface finish of the casting. Circular sand is better than triangular sand because the triangular sand has a large gap, which is easy to lead to defects such as porosity; According to the nature of the casting, the sodium silicate quartz sand is selected to form a spalling layer, and combined with the characteristics of cooling and shrinkage of the casting, the surface defects are reduced. Coating a protective layer on the surface of large castings, such as the film on a coated sand mold, can improve the surface finish of the sand mold and reduce the surface defects of the casting.  

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