The matching surface must be flat for ultimate accuracy.
采用平坦表面来确保精确度。
Generally speaking, to guarantee the accuracy of the flat surface process is easier than that of the bore.
一般来说，保证平面的加工精度要比保证孔的加工精度容易。
Generally speaking, to guarantee the accuracy of the flat surface process is easier than that of the bore.
一般来说，保证平面的加工精度要比保证孔的加工精度容易。
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