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问:用比较法测量量块的长度时,同名义尺寸的标准量块与被测量块一起受某一个相同温度的影响,当二者在另一个相同温度的影响下进行测量时,它们的相对长度应当没有变化或变化很小,所以用比较法测量量块时,只要保证标准与被测量块温度一致就行了,为什么在《尺寸至1000毫米的2、3、4、5等量块检定规程(JJG100-73)》(以下简称“规程”)中对各等量块在测量时还要规定温度对
Q. When measuring the length of a measuring block by the comparative method, the same measuring block of the nominal size is affected by the same temperature at one and the same temperature. When the two are measured under the influence of the same temperature, the relative The length should not change or change very small, so use the comparison method to measure the block, as long as the guarantee standard and the measured block temperature on the line, why in the “size to 1000 mm 2,3,4,5 equal block test procedures (JJG100-73) ”(hereinafter referred to as the“ rules ”) for each equal block in the measurement but also to specify the temperature on