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| |||
| distinctive; distinctively; unmistakable; unique; unmistakeable | |||
| non-interchangeable (z.B. Anschlüsse) | |||
| foolproof | |||
| non-interchangeable; non-reversible; polarized | |||
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unverwechselbar : 3 phrases in 3 subjects |
| Electrical engineering | 1 |
| General | 1 |
| Measuring instruments | 1 |