a naturally-occurring sulphide of zinc.

listen to the pronunciation of a naturally-occurring sulphide of zinc.
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Определение a naturally-occurring sulphide of zinc. в Английский Язык Английский Язык словарь

A naturally-occurring sulphide of zinc.
blende

The procedure up here with ordinary local zinc blende had been straightforward—first you got the sulfur to go off by roasting the blende to zinc oxide, and then you reduced the oxide to zinc metal.

a naturally-occurring sulphide of zinc.
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