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Halbwertsschichtdicke f
biol.	half-thickness (erste, zweite ...); half-value layer (erste, zweite ...); half-value thickness (erste, zweite ...); attenuation half-thickness (half-value layer, half-value thickness, first, second, ..., erste, zweite ...)
earth.sc.	half-value layer; half-value thickness
med.appl.	half-value layer (thickness)
phys.	half-value thickness HVT