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Lignit u ċappa |
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Lignit |
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Ċappa |
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Kokk |
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Fjuwil tal-gass |
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Gass tal-faħam, gass tal-mejn jew gass simili |
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Gass mill-faħam u gassijiet simili |
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Gass tal-majnijiet |
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Propanju u butanju |
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Gass tal-propanju |
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