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mass transport
earth.sc., mech.eng.	Stoffübertragung f; Stoffübergang m
energ.ind.	Massenübergang m; Stoffaustausch m
phys.	Massentransport m (e.g. by rivers)
refrig.	Stoffübergang m; Stoffübertragung f
mass transport physics, The movement of matter in a medium
environ.	Stofftransport m

mass transport: 3 phrases in 2 subjects

Earth sciences	2
Natural resourses and wildlife conservation	1