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| 音响测深图表; 超声波回声图 | |||
| 回声深度记录; 回波图 | |||
| 回声测深记录; 回声深度记录 | |||
| 超声回波图 | |||
| 回声图; 回声测深图; 回声测深深度记录图; 回声波图; 音响测深图 | |||
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echogram : 6 phrases in 3 subjects |
| Agriculture | 1 |
| Nursing | 1 |
| Technology | 4 |
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