BITUMEN (MINING)
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BTBITUMINOUS ASPHALTS + SHALES + OIL SHALES (MINING)
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UDC622.337.1
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Descriptor GERERDPECH + BITUMEN (BERGBAU)
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Descriptor ENGBITUMEN (MINING)
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Descriptor FREBITUMES (INDUSTRIE MINIÈRE)
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Variant GERBITUMEN (BERGBAU)