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| 单翼缝 | |||
| 投币电话单槽式投币口允许不同币值的各种硬币从单一槽口中投人 | |||
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single-slot : 7 phrases in 4 subjects |
| Electric machinery | 2 |
| Metallurgy | 2 |
| Plastics | 1 |
| Technology | 2 |
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