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| 21. | an athletic competition in which a heavy metal ball that is attached to a flexible wire is hurled as |
| 一种田径比赛项目，从直径七英尺的圆圈内向远处投掷一个附有软把手的金属球。 |
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| 22. | Flexible copper stranded conductors for electrical purposes-Part 3: Flexible copper wire for antenna |
| GB/T12970.3-1991电工软铜绞线第三部分:软铜天线 |
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| 23. | Flexible copper stranded conductors for electrical purposes—Part 3: Flexible copper wire for antenna |
| GB/T12970.3-1991电工软铜绞线第三部分:软铜天线 |
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| 24. | A flexible wire or group of wires with insulating and damage-protecting external cover as used to carry |
| 由一条或相互绝缘的多条导线和保护套构成的传输线，用于传送信号或电流。 |
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