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centre of mass
brit.	Massenzentrum n; Masseschwerpunkt m
construct.	Massenschwerpunkt m
earth.sc.	Schwerpunkt m
phys.	Massenmittelpunkt m
phys., obs.	Gravitationszentrum n
tech.	Trägheitsmittelpunkt m
centre of the mass
astr.	Massenmittelpunkt m

centre of mass: 7 phrases in 5 subjects

British usage, not spelling	3
General	1
Natural sciences	1
Packaging	1
Technology	1