Goudreau portable pneumatic drill, 1927

Goudreau portable pneumatic drill, 1927
Portable pneumatic drill with compressor, double-drum hoist, and tractor, 1927. From the Thirty-Sixth Annual Report of the Department of Mines
Portable pneumatic drill with compressor, double-drum hoist, and tractor, 1927. From the Thirty-Sixth Annual Report of the Department of Mines
Goudreau portable pneumatic drill, 1927