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1.The engineer used a tool back plane to smooth the surface of the metal.
工程师使用回旋平台来平滑金属的表面。
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2.The tool back plane is essential for precision work in the machine shop.
回旋平台对于机械车间的精密工作至关重要。
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3. The tool back plane was designed to make cutting easier and more precise.
回旋平台的设计目的是为了使切割更容易且更准确。