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trace elements
agric.	elementos traza; microelementos m; oligoelementos
trace element
agric.	microelemento m; micronutrientes
chem.	elemento vestigial; micronutriente f
econ.	oligoelemento m
environ.	oligoelementos; trazador m
food.ind.	microelementos m
health., food.ind., chem.	elemento traza
met.	elementos traza
trace element Any of various chemical elements that occur in very small amounts in organisms and are essential for many physiological and biochemical processes
environ.	oligoelementos

trace elements : 14 phrases in 4 subjects

Environment	3
General	1
Name of organization	9
Patents	1