| 释义 |
放大器fàngdàqì
1.能把输入讯号的电压或功率放大的无线电装置,由电子管或晶体管、电源变压器和其他电器元件组成。用在通讯、广播、雷达、电视、自动控制等各种装置中。{amplifier; radio device composed of electron tubes, transistors, transformer and other components for amplifying electrical voltage and power, used in communications, broadcasting, radar, television, auto-control equipment, etc.}
2.画图的时候,放大或缩小图形的用具。{device used in drawing for enlarging or contracting graphs;}也叫also放大尺{fàngdàchǐ}。 |