... /03 Type Test Report for Pole Type 'SP-BH' China Electric Power Research Institute of SGCC, Beijing, P.R. China 220kV Double Circuit ... /05 Type Test Report for Pole Type 'SP-BT' China Electric Power Research Institute of SGCC, Beijing, P.R. China 220kV Double Circuit ... /03 Type Test Report for Pole Type 'SP-BM' China Electric Power Research Institute of SGCC, Beijing, P.R. China 220kV Double Circuit ...