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| 微珠; 玻璃微球 | |||
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| 玻璃气泡 | |||
| 空心玻璃珠 | |||
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glass-bubble : 8 phrases in 3 subjects |
| Explosives and Explosive Ordnance Disposal | 3 |
| Oil / petroleum | 2 |
| Technology | 3 |
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