Collective forest is the main component of forest resources in China. Forest management survey is a very important technologic way in increasing the management level.

集体林是我国森林资源的重要组成内容，森林经理调查是提高集体林经营管理水平的一项重要技术手段。

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There are some MMI stations on level Ifor special technologic requirements of the production line, such as mathematic model, multiple analog treatment and dynamic operation etc.

一级设有mmi工作站以满足处理线特定的工艺要求，如：算数模型、多模拟量处理及动态操作等。

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