Abteufen von Schächten und Auffahren von Tunnels und Strecken

Poetsch, Friedrich Hermann; Poetsch, Jenny

Austrian Patent Office

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Technological Inventions 1850 - 1899

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Contents: Abteufen von Schächten und Auffahren von Tunnels und Strecken

Abteufen von Schächten und Auffahren von Tunnels und Strecken
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