4D-SB electric test pump is the General Machinery Research Institute, Ministry of Machinery Industry Joint design team test pump designed for the latest series of products, which have the old products, three high, long life, stable performance, mobile and flexible light weight and so on, and on this basis, an increase of the transmission and cross conversion, so that the series of products fully meet the requirements of the comprehensive value, a variety of performance more stable and reliable .Selected in the product structure of a closed water tank, reducing machine high to form a more compact appearance.