擦伤;
Manual processing makes traditional mechanical undercutter precision-poor , inefficient and labour-intensive .
传统的机械式下刻机采用手动加工,存在 精度差 、 效率低、劳动强度大等缺点.
By studying processing technic of undercutter, continuous processing and discontinuous processing are discussed.
通过对下刻机加工工艺的研究, 提出了连续和断续两种加工方法.
瑞鸿网 · 四六级英语
瑞鸿网 · 高考英语
瑞鸿网 · 双语娱乐资讯