湖南省自然科学基金
通过群钻钻头直径Ｄ，进给量ｆ和切削速度ｎ对孔径扩张量，圆度，孔中心线垂直度和直线度影响的试验，得出它们的变化规律。
By mean of tests on drilling with CMFD, the influence of the drill diameter, feed and the speed on the hole oversize, circularity, perpendicularity and straightness have been obtained.
王志安 胡仲勋.群钻钻削精度试验[J].湖南大学学报：自然科学版,1996,23(4):
