| 摘要 |
An exemplary machine tool (20) includes a base (31) and a plurality of components (33, 34, 35). The movable components are made of metal or metallic alloy with density in a range from about 1.7x103 kg/m3 to about 3.3x103 kg/m3. The movable components have relatively small weight. Therefore, the machine tool can remain stable, when machining, although the base is small and light because of the light movable components. A precision of the machine tool is not decreased, and miniaturizing the machine tool is practicable.
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