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Great Pyramid Hydraulic Pulse Generator and Water Pump

Working models of the suberranean section of the Great Pyramid. A hydraulic pulse generator and water pump built with the subterranean chamber.

Tunnel boring machine - Wikipedia

A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.They may also be used for microtunneling.

Barrick Gold Corporation - Barrick Reports Progress on Projects

ENDNOTES. For additional detail, see the Technical Report on the Cortez Joint Venture Operations, Lander and Eureka Counties, State of Nevada, U.S.A., dated March 21, 2016, and filed on SEDAR and EDGAR on March 28, 2016.