Edouard Bastarache on thu 25 mar 10
Manganese dioxide 100 =3D3D Manganese carbonate 132.22
=3D20
Manganese carbonate 100 =3D3D Manganese dioxide 75.632
Gis,
Edouard Bastarache=3D20
Spertesperantisto (Lernu-Paris)
Sorel-Tracy
Quebec
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