Leitfaden zur Bergbaukunde, Vol. 2 (Classic Reprint) - Hardcover

Excerpt from Leitfaden zur Bergbaukunde, Vol. 2

2. Ventilatoren für ganze Grubengebäude aa. Ventilator mit radialen Flügeln bb. Ventilator mit zurückgeneigten ebenen Flugeln cc. Ventilator von Guibal.

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