视频展示了在工程变更单情景下的协作。

The presented scenario shows collaboration in the context of engineering change order.

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并结合此工程洽商变更单的内容，逐项分析，解决第二章归纳出来的问题。(4)建筑工程洽商变更计价分析。

And combined with the content of this change order, analysis item by item, to solve the problems summarized of second part. (4) the analysis of cost of construction project change.

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并结合此工程洽商变更单的内容，逐项分析，解决第二章归纳出来的问题。(4)建筑工程洽商变更计价分析。

And combined with the content of this change order, analysis item by item, to solve the problems summarized of second part. (4) the analysis of cost of construction project change.

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