Tai'an Yongtai Machinery Equipment Co., Ltd. is a direct subsidiary of China Ordnance Industry Group No. 523 Factory, located in the High tech Development Zone of Tai'an City, Shandong Province. The main factory area covers an area of 113 acres and includes comprehensive management buildings, machining rooms, auxiliary workshops, and supporting water and electricity facilities, with a construction area of nearly 20000 square meters. The factory currently has 560 registered employees, including nearly 50 professional and technical personnel. It has 457 various metal cutting machine tools, more than 30 forging equipment, more than 20 testing equipment, and fixed assets of 50 million yuan. It is a variable frequency fuel injection pump test bench produced by a medium-sized electromechanical product production company in Tai'an City. It is divided into three series: 12PSB-A, 12PSB-C, and 12PSB-D, with more than 20 varieties and complete models and specifications, which can meet the testing needs of users for mechanical fuel injection pumps, VE pumps, and mechanical unit pumps. The fuel injection pump test bench has stability, reliability