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| Spanish | English |
| capa de atenuación | half-value thicknes abbreviation: HVT |
| capa de atenuación | half-value layer abbreviation: HVL |
| capa de semiatenuación | half-value thicknes abbreviation: HVT |
| capa decimorreductora | tenth-value thickness abbreviation: TVT |
| capa decimorreductora | tenth-value layer abbreviation: TVL |
| capa hemirreductora | half-value thicknes abbreviation: HVT |