对于两个相配合的零件,按照国家标准公差与配合(GB1800—79)的“总论、标准公差与基本偏差”的决定,应该按照极限尺寸判断原则进行。但是,国家标准形状与位置公差(GB1182—80)的“形状和位置公差代号及其注法”标准中规定:对于配合零件,需要符合极限尺寸判断原则时,在其尺寸后加注符号“(E)”,这对大家贯彻“两项标准”中,造成了一定的混乱。最近,“公差配合”和“形位公差”两项标准技术委员会,对确定尺寸公差与形位公差之间关系的三个公差原则,做了进一步的研究和分析,并取得了一致的意见。现将国家标准总局,国标发办字(1982)088号文关于———批转机械工业部标准化研究所“对独立原则、包容原则和最大实体原则的 For two matching parts, according to the national standard tolerance and cooperation (GB1800-79) “general theory, standard deviation and basic deviation,” the decision should be in accordance with the principle of limit size judgment. However, the National Standard Shape and Position Tolerance (GB1182-80), the “Shape and Position Tolerance Codes and Their Methods of Injection” standard stipulates that when mating parts are required to comply with the principle of limit size, their dimensions shall be marked with “( E) ”, which has caused some confusion for everyone to implement the“ two standards. ” Recently, two standard technical committees, “Tolerance Fit” and “Shape Tolerance”, made further research and analysis on the principle of three tolerances for determining the relationship between dimensional tolerance and geometric tolerance, and reached a consensus. Now the State Administration of standardization, the word issued by the national standard (1982) No. 088 on --- Forward Machinery Industry Institute of Standardization "on the independence, inclusion and the principle of the most substantive