格里内尔和西康公司最近联合研制了世界上第一部用于井下通信的中频无线电收、发讯机,Sc100型。人们认为这项新成果是井下通信的重大突破。在1978年的南非“谢尔”设计竞赛会上引起了海外许多国家的兴趣。 Gailner and Xikang recently jointly developed the world’s first mid-frequency radio transceiver, transmitters, and the Sc100, for downhole communications. People think this new achievement is a major breakthrough in underground communications. In 1978, the “Sher” design competition in South Africa aroused the interest of many overseas countries.