There are two parts in the system, which are hook filter driver module and the module of user interface.

系统主要分为两个模块：过滤钩子驱动模块和用户操作界面模块。

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Generally, the crane driver depend on the experience and sight to set the height of the hook, which have some disadvantages of low precision and waste the human resource.

通常情况下，天车司机是凭借着经验和肉眼观察来确定吊钩高度的，这样做的缺点是精度低，且造成了人力资源浪费。

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Generally, the crane driver depend on the experience and sight to set the height of the hook, which have some disadvantages of low precision and waste the human resource.

通常情况下，天车司机是凭借着经验和肉眼观察来确定吊钩高度的，这样做的缺点是精度低，且造成了人力资源浪费。

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