焊条
   焊条(coveredelectrode)，是在金属焊芯外将涂料(药皮)均匀、向心地压涂在焊芯上。焊芯即焊条的金属芯，为了保证焊缝的质量与性能，对焊芯中各金属元素的含量都有严格的规定，特别是对有害杂质（如硫、磷等)的含量，应有严格的限制，优于母材。
   Welding rod ( coveredelectrode ), is in the metal cores will paint ( coating ), radial pressure on the core wires uniformly. The core that welding metal core, in order to ensure the welding quality and performance, the core of each metal element content have stringent requirements, especially for the harmful impurities ( such as sulfur, phosphorus) content, should have strict restriction, is better than that of base material.