Koking Plant, Dortmund, rodding access at a gas compressor

Zeche Zweckel, Gladbeck, collectors at the converter

(from left to right)

Koking Plant Hansa, leading bevel wheel for the elevator conveyor for extraction of coal

Koking Plant Hansa, Dortmund, entries to storage rooms beneath the coal bin

(from left to right)

Koking Plant, Dortmund, stairway at the gasholder (5000)

landscaped park Duisburg-North, hand wheel at an ingold mold trolley to transport liquid steel

(from left to right)