Электронная книга

Oxy-Acetylene Welding and Cutting: Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon

Электронная книга

Oxy-Acetylene Welding and Cutting: Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon