当重量值达到目标值时，按“自动划线”按钮。
When it gets close enough to the target weight, press the button SCALE AUTO on.
如果参数有一个var 关键字，一个公有的写方法会被自动生成，并且名字为参数名加下划线等号（_=）。
If a parameter has the var keyword, a public writer method is also generated with the parameter’s name as a prefix, followed by _=.
按ent按钮来设置设置自动接收方式并且下划线移动到下一栏(半音调记录栏)。
Press ent button to set the AUTO receiving mode and the underline moves to the next entry column (Halftone Recording entry).
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