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part per million
anim.husb.	partie par million; milligramme par litre; mg/l m; milligramme par kilo; mg/kg m; gramme par mètre cube; g/m3 m; ppm; parts par million
parts per million
chem.	parties par million
scient., tech.	millionième m

part per million : 5 phrases in 4 subjects

Environment	2
Health care	1
Natural resourses and wildlife conservation	1
Natural sciences	1