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| curve ruler | |||
| spline | |||
| curves ruler; flexible rule | |||
| curved ruler; curved measure; curved rule; vary-form curve rule | |||
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| D curved ruler | |||
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曲线 尺 : 22 phrases in 8 subjects |
| Architecture | 1 |
| Drilling | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| Geology | 1 |
| Oil / petroleum | 4 |
| Technology | 9 |
| Textile industry | 4 |
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