【摘要】 本文在简要回顾我国一字型硬质合金针头发展历史的基础上，结合该产品的三次国家监督抽查结果，分析了该产品的质量现状，并就其存在的问题提出了建议。更多还原

【Abstract】 On the basis of looking back in brief the developmental history of flat hard-metal drill bit in China,combining with the results from the thrice random sampling of this product, made by China’s national supervision authorities,the authors analyze the present situation of the product quality and make some recommendations for its existing problems.更多还原