Welding is a joining process wherein fusion is obtained by heating with an arc between a covered metal electrode or a consumable wire and the work. In this instance, the root pass is being made with the semi-automatic gas-metal-arc welding process, in which the consumable wire is used., 1976-07, PCA0002-2b-16, Folder: PCA0002-2b. Alyeska Pipeline Service Company : Trans-Alaska Pipeline Construction Collection, 1976-1977, PCA 2. Alaska State Library - Historical Collections Finding Aids. https://alaska.libraryhost.com/repositories/2/archival_objects/17515 Accessed February 22, 2025.