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BS 3171:1959
Characteristics & method of test of air conduction hearing aids using electronic amplification
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Technical characteristics
| Publisher | British Standards Institution (BSI) |
| Publication Date | 11/23/1959 |
| Cancellation Date | 03/22/2022 |
| Page Count | 0 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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23/11/1959
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