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énergie d'activation
chem.	Arrhenius activation energy; activation energy; energy of activation
earth.sc.	intensity of activation
el.	intrinsic ionisation energy; intrinsic ionization energy
energ.ind.	ignition energy
énergie d’activation
anal.chem.	activation energy
chem.	critical increment of energy

énergie d ’activation: 7 phrases in 4 subjects

Chemistry	1
Electronics	3
General	2
Metallurgy	1