Spain-based engineering company Abengoa has completed the USD125.4 million sale agreement with China's State Grid International Development Limited, the Hong Kong-based arm of the state-owned transmission company State Grid Corporation of China (SGCC), to sell 25 per cent of its stake in Brazilian transmission concessionaires Expansion Transmissora de Energia Electrica (ETEE) and Expansion Transmissao Itumbiara Marimbondo (ETIM).