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pyrolusite
f
chem.
polianite
(min.)
;
manganese dioxide
;
black manganese dioxide
industr., construct., chem.
manganese dioxide
;
manganese dioxide mineral
life.sc.
battery ore
met., engl.
pyrolusite
mineral.
battery manganese
min.
pyrolusite
f
chem.
manganese dioxide
;
manganese peroxide
;
min.
pyrolusite
;
polianite
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