【单选题】薄板群钻的形状特点是,主切削刃磨成圆弧形,钻尖高度磨低,切削刃外缘磨成锋利的两个刀尖,与钻心尖相差(),形成三尖。
【多选题】薄板群钻的特点是()
A.
薄板群钻两切削刃外缘磨成锋利的刀尖,钻心尖在高度上仅相差1~2mm
B.
薄板群钻两切削刃外缘磨成锋利的刀尖,钻心尖在高度上仅相差0.5~1.5mm
D.
薄板群钻的特征要点是迂回、钳制靠三尖,内定中心外切圆
【单选题】Whether this will be your first or your thousandth business trip, you should be conscious of conduct that is considered proper during your absence from the office. As a representative of your company,...
【判断题】薄板群钻的特点是:两切削刃外缘磨成锋利的刀尖,比钻心尖在高度上高出0.5-1.5mm。能起到良好的 定心作用,并能提高孔的圆整度和降低粗糙度值。