Manganese-dioxide-sample.jpg
Benjah-bmm27
en
Manganese dioxide sample, Black powder, Samples of inorganic compounds, Manganese dioxide, Media lacking a description
commons
ja
二酸化マンガン試料、黒色火薬、無機化合物サンプル、二酸化マンガン、メディアに記載がない
commons_translated
manganese bronze dioxide manganese inorganic inorganically inorganic compound gunpowder sampling