而零件是否能达到加工要求，主要取决于机床本身动力头的设计与制造精度是否达到了一定的程度。
But whether the parts can achieve processing requirements, mainly depends on the machine head itself in the design and manufacture of precision is achieved certain degree.
镗床用来加工直径较大的孔，能达到较高的加工精度。
The boring machine used to process larger diameter hole, to achieve higher machining accuracy.
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