get使用两个参数：一个是字典本身，另一个是在字典中查找的键。
Get takes two arguments: the dictionary itself, and a key to look up in it.
可根据参数映射键中的前缀rateType加以识别。
They can be identified by the prefix Rate Type in the parameter map key.
第一个参数是keys，这是在map函数中创建的键的列表。
The first, keys, is a list of keys that were created in the map function.
当前的刀具参数只以简单的状态键显示。
The current tool parameters are displayed on a simple status bar.
当前的刀具参数只以简单的状态键显示。
The current tool parameters are displayed on a simple status bar.
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