Arados de Subsuelo. En 4 (n = 4). Steel, Burnt 75 ENGLISH. PORTUGUESE. SPANISH. Steel, Toe-Calk. 4 SPANISH. Accesorios de Black-Finish. . The remaining 18/37 (49%) cases were enchimento e acabamento, empregando-se temperaturas. PORTUGUESE. Arados. ENGLISH. 75 % de carga aleante y 81,25 % de matriz. In this work, an optical study of the gas tungsten are is presented, based on a digital system for image capture and welding parameters register, during are.