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频率标准
| 稳定性
| 频率标准 | |
| geophys. | frequency standard |
| 稳定 性 | |
| chem. | constancy |
| 稳定性 | |
| econ. | strength |
| hydroel.st. | stability; rigidity; steadiness |
| mech. chem. | stability |
| met. | fastness; firmness |
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| frequency standard | |||
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频率标准 : 68 phrases in 15 subjects |
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