跟踪数字化tracingdistortion: 描纹畸变 示踪畸变 包线失真tracing wheel and tracing paper: 过线纸和裁衣辘tracingpen: 描迹笔尖 自记笔tracing wheel: 仿形轮; 描迹轮; 描线轮tracingpoint: 描绘点 描迹点下载手机词典可随时随地查词查翻译