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国家标准《公差与配合》是一项应用广泛、涉及面广、影响深远的基础标准。是机械工业各个部门进行产品设计、工装设计和制订其它标准的基础。是评定产品质量的重要技术指标。在机械工业中具有十分重要的作用。一九五九年,我国颁布实施国家标准《公差与配合》以来,对机械工业的发展起到了应有的作用,但随着技术的发展和国际交流的扩大,旧国标已远远不能满足生产发展的需要。国家标准总局委托一机
National standards “tolerance and cooperation” is a wide range of applications, involving a wide range of far-reaching impact of the basic standards. It is the basis of product design, tooling design and formulation of other standards in all sectors of the machinery industry. Is to assess the quality of the product of an important technical indicators. In the machinery industry has a very important role. Since the promulgation and implementation of the national standard “tolerance and cooperation” in 1959, China has played a due role in the development of the machinery industry. However, with the development of technology and the expansion of international exchanges, the old national standard is far from meeting the needs of production Development needs. National Standard Administration commissioned a machine