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According to David's technical specification of Heilongjiang Province, what qualifications must be possessed for tower maintenance?

Steel structure engineering professional contracting level 3 or above qualification.

This is one of the necessary qualifications for tower maintenance. The qualification of steel structure engineering contracting is a kind of identity certificate of enterprises engaged in steel structure engineering construction and management. Having this qualification means that enterprises have certain technical and management capabilities in steel structure construction. In addition to the above qualification requirements, the specific technical specifications and requirements also include other requirements, such as safety management and electrical engineering.