pantograph/ˈpæntəgrɑ:f; ?@ -græf; `pæntəˌɡræʃ/ n1 instrument used to draw an exact copy of a plan, map, etc on any scale 缩放仪; 比例绘图仪.2 device for carrying an electric current from overhead wires to a train （电气列车顶上的）导电弓架.
牛津英汉双解词典