Our TETRA 800M Narrowband Digital Trunking System (device and terminal) and 1.4G/1.8G Broadband Digital Trunking Equipment and Terminal have been welcomed in chemical industries such as chemical industrial parks, oil fields, gas fields, mines. In addition, the company has built a long-term partnership with Shanghai Chemical Industrial Park, Yangzi Petrochemical, Lianyungang Chemical Industry Park, PetroChina Xinjiang, and the coal and coking businesses in Shanxi, through which we supply them with customised products and solutions.