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| mechanical registration | |||
| mechanical recording; mechanical registering | |||
| 机械记录: 12 phrases in 8 subjects |
| Aviation | 1 |
| Compressors | 1 |
| Drilling | 1 |
| Earth sciences | 1 |
| General | 1 |
| Mining | 1 |
| Oil / petroleum | 1 |
| Technology | 5 |
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