(n.) One of the districts divided by pillars of extra size, into which a mine is laid off in one system of extracting coal.
PANEL (10)
Meaning of PANEL (10) in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) One of the districts divided by pillars of extra size, into which a mine is laid off in one system of extracting coal.
Webster's English dictionary. Английский словарь Webster. 2012