Industria metalr͠gica Metal trade Copper industry and trade 26 Industria del cobre 26 Metals testing 18 Pruebas de metales 18 Joyera̕ 11 more ... Metales preciosos 11 Comercio del cobre 10 Copper trade 10 Activacin̤ metl̀ica 9 Metal activation 9 Copper 7 Jewelry 7 Precius metals 7 Cobre 6 Copper ores 6 Fabricacin̤ de acero 6 Jewelry making 6 Jewelry manufacturing 6 Manufactura de joyas 6 Metales 6 Metallurgy 6 Metals 6 Metalurgia 6 Minerales de cobre 6 Precious metals 6 Steel making 6 Aleaciones 5 Alloys 5 less ...