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World Metrology Day
释义
World Metrology Day
Encyclopedia
工学
国际计量
释
World Metrology Day
世界计量日
1875年5月20日,法国等17个国家的代表在巴黎签署《米制公约》,成立了旨在协调国际计量和米制发展的国际计量组织。为纪念《米制公约》的签署,1999年10月第21届国际计量大会确定5月20日为世界计量日,并得到国际法制计量组织的认同。
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Associated Research Centers for the Urban Underground Space
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