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把生产尺寸公差在10nm左右、表面粗糙度在1nm左右的零件定义为超精细生产。目前已可以制造出尺寸仅1μm的零件,甚至可以将它们按10nm
To the production size tolerance of about 10nm, the surface roughness of about 1nm parts defined as ultra-fine production. It is now possible to make parts that are only 1 μm in size, even at 10 nm