Yantai Drg masana'antu Co., Ltd. (An buga shi a matsayin DNG) yana cikin yankin Yantai, wanda aka san shi da tushen samarwa na kasar Sin. DNG yana da karfi na fasaha da ƙwarewar samar da wadataccen kayan masarufi, wanda ya ƙware a cikin Hamms na Hydraulic, kamar su chosel, daji, Rod Pin, kututture, da sauran samfuran tallafi. DNG yana da tarihi sama da shekaru 10, da masana'anta sun wuce ISO9001, Takaddun shaida na ISO14001 da Takaddun shaida.