https://www.youtube.com/watch?v=uAXAA2DceJs 1. control + v 打開visual block，然後選擇 2. shift+ i 輸入之後按兩次esc 删除：
![鋼鐵平面焊接的缺陷檢測案例【附代碼】[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)