On December 29, 2015, in Xuzhou, the capital of construction machinery, Dunan Heavy Industry's DTR3205H full casing full rotary drilling rig made a stunning debut, offering another powerful construction tool for foundation engineering in special environments. About one hundred people, including renowned experts and scholars from the industry as well as user representatives, attended the launch event, jointly witnessing Dunan Heavy Industry's renewed positive contribution to the diversified development of China's piling machinery.