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| 节径比; 电缆绞距与芯线平均直径之比; 电缆敷设比 | |||
| 绞距系数; 绞距比 | |||
| 扭绞系数; 电缆光缆敷设比曲率半径与直径之比 | |||
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lay ratio : 3 phrases in 3 subjects |
| Construction | 1 |
| Metallurgy | 1 |
| Technology | 1 |
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