陶瓷轴承电主轴单元的出现，使数控机床的产品档次明显提高。
Because of occurrence of ceramic bearing electric spindle units, the level of product of numerical control machine tools had obviously been enhanced.
对新的设计，先选定电主轴后，其尺寸参数，可作为干涉约束条件，可计算得到无电主轴干涉的并联机床设计参数。
For new design one, the dimension of the new electric spindle selected will be the interference constraint conditions and the machine will be without this interference.
超精密电主轴是超精密机床的关键技术之一。
Ultra precise spindle is one of the key technologies of ultra precise machine tool.
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