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Green sand casting is the most traditional and commonly used method. It utilizes a mixture of sand, clay, and water to create molds. The term green refers to the moisture content in the sand rather than the color. This process is ideal for producing large quantities of parts due to its high speed and efficiency.

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One of the key advantages of precision casting is its ability to produce highly complex shapes that would be difficult or impossible to achieve through traditional machining methods. This is particularly beneficial when producing parts with fine details, such as internal passages or intricate designs. The typical precision of this process can reach 0.1mm to 0.2mm in class, which significantly reduces the need for secondary machining and finishing operations, saving time and reducing costs.