'A part-iridium cylinder in France is the standard for this metric unit of mass (about 2.2 pounds)'
a kilogram
FRANCE: A part-iridium cylinder in France is the standard for this metric unit of mass
A part-iridium cylinder in France is the standard for this metric unit of mass
A part-iridium cylinder in France is the standard for this metric unit of mass
FRANCE
a kilogram
FRANCE