| Label | Vocabulary | Concept | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Customizing | LC Subject Headings (LCSH) |
General Subdivision | sh99005475 | |
| 2. | Maintenance and repair | LC Subject Headings (LCSH) |
General Subdivision | sh00007535 | |
| Repair and maintenance | |||||
| 3. | Performance | LC Subject Headings (LCSH) |
General Subdivision | sh00005754 | |
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