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a tal fine è molto importante separare l'olio dalle morchie che interferiscono negativamente con l'olio.
in order to do this it is very important to separate the oil from the deposits which negatively interfere with the oil.
esse contengono infatti sostanze come amianto, oli, morchie, policlorobifenili (pcb) e metalli pesanti.
these include substances like asbestos, oil and sludge oil, polychlorinated biphenyls (pcbs) and heavy metals.