具有专利设计的山特维克导向钻头于20年前首次引入市场,其革命性的端部中心凹以及片齿形边齿设计,特殊的易返式钻头本体,使其在钻孔直线度方面一直处于市场领先地位。而山特维克全新一代导向钻头仍然具有专利授权,较原设计有多项显著改进,让操作手能实现更高的作业效率,提高 The patented Sandvik pilot bit, introduced for the first time 20 years ago, has a revolutionary end recess and flank tooth design with a special return bit body that keeps it straight in the hole In a market-leading position. Sandvik's new generation of pilot bits still have a patent license, a number of significant improvements over the original design, allowing operators to achieve higher operational efficiency and increase