InLine Hydraulik GmbH is the inventor of the piston pump torque controller, dating back to 1901, and has been operated by Sweden's VOLVO and Germany's HAWE Group. In 2015, Hengli Hydraulic and Germany HAWE Group reached a strategic cooperation, successfully acquired HAWE InLine Berlin, and established Hengli German R & D center. InLine piston pumps have excellent efficiency and robust design, coupled with a variety of functional control device options, to meet the product in high pressure, high power, high speed application needs, and obvious advantages, widely used in the metallurgical industry, Marine engineering, construction machinery, shield tunneling equipment, municipal vehicles and agricultural machinery and other fields.