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1 标准本身的缺点影响数值修约的数位现行标准中对数值修约常有这样的规定:“按相应标准规定位数修约”、“试验数据至少应保留两位有效数字”、“保留两位有效数字”、“计算取三位有效数字”等等,这些都是不妥的。如果这样要求修约后的有效位数与产品标准规定的数值位数相同,那么就有可能使试验结果产生错误。例如某合金结构
1 standard itself, the shortcomings affect the value of the number of rounding the number of the current standard repair conventions often have such a rule: “According to the corresponding standards to fix the number of digits about ”, “test data should be retained at least two significant figures” , “Keep two significant digits”, “Calculate three significant digits” and so on, these are not appropriate. If the required number of effective digits after revision is the same as the number of digits specified in the product standard, then the test result may be wrong. For example, an alloy structure