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| 火山碎屑岩 | |||
| 火成碎屑岩 | |||
| 火山岩 | |||
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| 火成碎屑岩; 火山碎屑岩 | |||
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pyroclastic rock : 8 phrases in 2 subjects |
| Oil / petroleum | 5 |
| Technology | 3 |
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