一种新型的机械设计万能工具尺,近日已向中国专利局申请了专利。该工具尺主要是将现有的《机械设计手册》上、下两本,《六项互换性标准》、《紧固件手册》等数千页的手册综合起来,缩编为四把一套的拉尺。具体内容包括:公差与配合、形位公差、螺纹直径与螺距系列、配合与标准等。尺上所有图例、代号、尺寸标准、标准方法、数字等都一目了然,不用心算或口算,一看即得,从而改变了过去那种查阅麻烦、携带小便的状况,因而在 A new type of mechanical design universal tool ruler, the Chinese Patent Office has recently applied for a patent. The tool ruler is mainly the existing “Mechanical Design Manual”, the next two, “six interchangeability standards”, “Fastener Manual” and thousands of pages of manual combined, reduced to four sets Pull-tab. Specific content includes: Tolerance and cooperation, form tolerance, thread diameter and pitch series, with the standards and so on. All legend on the ruler, code, size, standard methods, figures, etc. are clear at a glance, do not mind or mouth count, a look that has changed the past, the kind of access to trouble, carry urine situation, so in