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| tapered slot; trapezoidal slot; graded slot | |||
| dovetailed groove; trapezoid slot | |||
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梯形槽 : 27 phrases in 6 subjects |
| Agriculture | 1 |
| Electric machinery | 2 |
| Hydroelectric power stations | 5 |
| Metallurgy | 1 |
| Plastics | 1 |
| Technology | 17 |
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