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现存量块长度标准体系不符合国际标准发展趋势、本文分析现有各国研制的长度标准仪器后，指出实际存在着激光干涉与实物标准相结合的情况。作者认为倡导采用混合型长度标准，更适合基层的实际应用和习惯。
The standard system of the length of the existing blocks does not conform to the development trend of international standards. After analyzing the length standard instruments developed in various countries, this paper points out that the actual existence of the combination of laser interference and physical standards. The author believes that advocating the use of hybrid length standards is more suitable for grass-roots practical applications and habits.