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elementos traza
agric.	minor elements; trace elements; micro elements
food.ind.	micromineral; oligo-element; trace mineral; micro element
met.	trace element; tramp element
elemento traza
gen.	oligoelement
agric.	micronutrient; micro element
chem.	micro-nutrient
health., food.ind., chem.	minor element; trace element; micro-element

elementos traza : 2 phrases in 2 subjects

Environment	1
Geology	1