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README.md

@@ -358,7 +358,7 @@ Step 2.5: if c == CMD_PRINT then 打印数据
 Step 2.6: 
 
 
-![主程序流程图](picturemain.svg)
+![主程序流程图](picture-main.svg)
 
 
 #### save_data

picture/picture-main.drawio.svg

@@ -1,6 +1,14 @@
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