On the evening of May 10, 2019, DHTT engineers completed the new model DH3500-LL independently developed and manufactured by the company day and night, which also means that the equipment can be offline smoothly and put into the construction of customers as soon as possible. DH3500-LL uses Cummins dual-engine power (2*264KW), the maximum push-pull force can reach 3500 KN, and according to the requirements of working conditions, single or double engines can be selected to work, with high efficiency and energy saving.