电子图表 meaning in English

electronic chart

Supplement to graphic symbols for electrical and electronics diagrams
电气和电子图表的图形符号补充件
Graphic symbols for electrical and electronics diagrams including referece designation letters
电气和电子图表用图形符号
Ecdis . maritime navigation and radiocommunication equipment and systems - electronic chart display and information system - operational and performance requirements , methods of testing and required test results
海上导航和无线电通信设备和系统.电子图表先显示和信息系统