The Handley Page H.P.42 and H.P.45 were four-engine biplane airliners designed and manufactured by British aviation company Handley Page, based in Radlett, Hertfordshire. It held the distinction of being the largest airliner in regular use in the world upon the type’s introduction in 1931 (source wikipedia)
We Cutting Tools THREADING INSERTS Co. Ltd specializes in developing and snmg inserts Carbide Turning Inserts manufacturing high-quality machining inserts. boring inserts We have a full carbide Insert capacity machining insert milling Inserts tungsten insert sharpener sales, research, and parting tool Inserts production. We also produce cemented carbide cutting Carbide Inserts inserts, grooving inserts, customized tungsten carbide insert inserts, and cermet inserts.