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The machine tool bed is made of gray iron, and the residual stress is eliminated by aging treatment to ensure high rigidity and stability of machine tools. The utility model has the characteristics of firm structure, stable work, good rigidity, simple operation, wide milling range, strong bearing capacity and strong milling intensity. A series of optimized configuration of stainless steel fully closed telescopic dust cover and hydrostatic guide rail in main guide way. To achieve high speed heavy cutting, fully adapt to the current society to improve efficiency and reduce production costs. With various tools and fixtures, groove milling can be carried out.