premogov grušč
premogov prah, premogov grušč
dust consisting of a mixture of small coal fragments and coal dust and dirt that sifts out when coal is passed over a sieve [Prah, ki sestoji iz mešanice majhnih koščkov premoga, premogovega prahu in umazanije, ki se otrese, ko premog preide prek sito.]
Dostopnost
Dostopnost