The metre–tonne–second (MTS) system of units was invented in France (hence the derived unit names sthène and pièze) where it became the legal system between 1919 and 1961.
[1] It was adopted by the Soviet Union in 1933 and abolished there in 1955.
It was a coherent metric system of units, much as SI (itself a refinement of the MKS system) and the centimetre–gram–second system (CGS), but with larger units for industrial use, whereas the CGS system was regarded as only really suitable for laboratory use.
[2][3] The base units of the MTS system are: Some common derived units: