View of the B1 carbon layer. Tunnel 6. View of an exposed carbon layer in the open mine. Part of the loose-leaf photo album offered by the staff of the Boekit-ASAM coal mines on Sumatra on the separating engineer director H. Tromp on January 7, 1922.

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Size: 2500px × 1975px
Photo credit: © BTEU/RKMLGE / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: voorkeursbeeld