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foam | |||
pumice stone; pumite | |||
pumice; pumicate; pumicestone | |||
pumicite; volcanic foam | |||
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pumice | |||
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pumice |
浮岩 : 21 phrases in 6 subjects |
Desert science | 2 |
Engineering geology | 2 |
Explosives and Explosive Ordnance Disposal | 2 |
Geology | 1 |
Oil / petroleum | 2 |
Technology | 12 |