Add the code shown in Listing 7 at line 103 (below the close-pinch 50-point if closing bracket) for open-pinch detection.
在第103行(关闭按压第50点的if关闭括号之下)中添加清单7中所示的代码，进行打开按压检测。
Add the code shown in Listing 7 at line 103 (below the close-pinch 50-point if closing bracket) for open-pinch detection.
在第103行(关闭按压第50点的if关闭括号之下)中添加清单7中所示的代码，进行打开按压检测。
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