Aperçu gratuit du livre Scientific Methods to Tempering Steel; Compounds for Welding and Restoring Burnt Steel, Compounds for Hardening Steel, Case Hardening, Hardening Solutions for Chills, for Ball Bearings, Compound for Welding Copper
Scientific Methods to Tempering Steel; Compounds for Welding and Restoring Burnt Steel, Compounds for Hardening Steel, Case Hardening, Hardening Solutions for Chills, for Ball Bearings, Compound for Welding Copper