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Halbwertszeit f =, -en
gen.	vida media
chem.	periodo de vida media
environ.	media de vida
geol.	media vida
nat.sc.	periodo de semidesintegración
nucl.phys.	periodo de desintegración
PhysikalischeHalbwertszeit f
gen.	período radiactivo

Halbwertszeit : 3 phrases in 2 subjects

Chemistry	1
Health care	2