Homework / test English to Spanish Tech/Engineering Engineering: Industrial ultrasonidos

Es un artículo que habla sobre la soldadura de metales con ultrasonidos. La frase en la que aparece es la siguiente: "Commonly used techniques involving the fusion of metal through the application of heat by flame, hot tools, electric current or electric arc in combination with cleaning and fluxing agents and sometimes filler metals are able to join these materials but the characteristics of these processes and the materials to be joined are at odds with one another."