paperback. Zustand: New. Language:Chinese.Paperback. Pub Date: 2020-05-01 Pub Date: 2020-05-01 Publisher: Jinan University Press this book with the main line of learning the map. introduces the training evaluation system of 20 professional and technical positions of the power grid system (ie. learning map). respectively. electricity price. Customer service position. marketing inspection position. electricity billing position. measurement automation position. shift operation position. substation of one equipment posit.