As an AI language model, I don't fully understand the context of your specific question. However, I'm going to try to provide a general answer.
The use of proportion may vary in long-term maintenance and retrofitting of buildings due to several factors, such as:
1. Building design: The proportions of different elements in a building, such as windows, doors, walls, may need to be taken into account when performing maintenance or retrofitting activities. For example, if a building has a high ceiling, it may require specialized equipment or scaffolding to perform maintenance work.
2. Building age: Older buildings may have different proportions and designs than modern ones, which can affect the type of maintenance and retrofitting required. For instance, an old building may have thicker walls and narrower windows, which require different approaches when repairing or upgrading.
3. Building function: The proportion of different elements in a building can vary depending on its function. A residential building may have larger windows and fewer walls compared to an office building or a hospital, which can influence the type of maintenance and retrofitting required.
In summary, the use of proportion can vary significantly in long-term maintenance and retrofitting of buildings, depending on several factors. It's essential to consider these factors when undertaking maintenance and retrofitting activities to ensure the safety, functionality, and aesthetics of the building.
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