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Photograph

Three-Deck Drilling Platform at Hoover Dam

Date:	1932
Description:	Front view of a three-deck drilling platform mounted on an International truck. The device was used in the interior of the tunnels during construction of t...

Photograph

Tractor-Powered Sawmill

Date:	07 13 1925
Description:	View down slope towards a tractor powering a sawmill in a forest. There is a valley and hills in the background.

1

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