Different qualities of coal

Horst Schmadel, Seingbouse (F) and Staatskanzlei des Saarlandes Open Gallery

The various qualities of coal include briquette, graded coal and fractional coal.

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Details

Title: Different qualities of coal
Creator: Horst Schmadel, Seingbouse (F), Staatskanzlei des Saarlandes Open Gallery
Subject Keywords: Das Erbe Kapitel 1 – Kredit der Sonne

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