Lignite mining
Lignite mining
Lignite is a sedimentary rock that still shows traces of plant structure. It is a coal with lower heating value.
00:47
Grades Pre-school – 10
mozaLink
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Lignite is a sedimentary rock that still shows traces of plant structure. It is a coal with lower heating value.
00:47
Grades Pre-school – 10
mozaLink
/Weblink