Tunnel drill carriages -- Their economic possibilities
Jacketing a railway tunnel by mining methods
Construction Challenges In Maglev Transport
Quebec, North Shore and labrador railway
Design considerations of high-speed eddy-current brake
The lake superior and ishpeming railroad
Drill-carriage wings held up by toggle braces
Study on the Drilling Formation Selection and Risk Analysis of the Directional Drilling
Super MPD Thrusters for Interplanetary Travel
The kiln drying of woods for airplanes
Steel structural parts for aircraft
Experiments with fabrics for covering airplane wings to determine effect of method of installation
Visualising promises of material shipments
Une Industrie Miniere En Ardenne Envahie
Experiments with fabrics for covering airplane wings