我厂生产的红灯747型无线电话机由国家水产总局、电子工业部推荐为沿海渔业通讯工具。由于该机采用的频段具有一定的绕射和爬坡能力,因此也适用于山区、丘陵、森林、矿山、地质勘探等作为通讯工具。但该机自投产后几年来,销售增长 The red light 747 wireless telephone produced by our factory is recommended by the State Fisheries Administration and the Ministry of Electronics Industry as a coastal fishing communication tool. Because the frequency band used by the aircraft has a certain degree of diffraction and climbing ability, it is also suitable for communication tools such as mountains, hills, forests, mines, and geological exploration. However, sales of the aircraft have increased over the past few years since it was put into production