πβοΈπβ
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#standardization
#measurement standards
#system definition
#official units
#metrology
#specification
π«π·ποΈβ γmkgs...γ
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#si
#BIPM
#international bureau of weights and measures
#metric system
#measurement standards
#sèvres france
#metrology
#official units
#standardization #measurement standards #system definition #official units #metrology #specification