| Label | Vocabulary | Concept | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Protection | LC Subject Headings (LCSH) |
General Subdivision | sh00005022 | |
| 2. | Inspection | LC Subject Headings (LCSH) |
General Subdivision | sh00006257 | |
| 3. | Materials | LC Subject Headings (LCSH) |
General Subdivision | sh2002006405 | |
| 4. | Fires and fire prevention | LC Subject Headings (LCSH) |
General Subdivision | sh00005751 | |
| Fire prevention | |||||
| 5. | Heating and ventilation | LC Subject Headings (LCSH) |
General Subdivision | sh00006016 | |
| Ventilation | |||||
| 6. | Defects | LC Subject Headings (LCSH) |
General Subdivision | sh99005477 | |
| 7. | Safety appliances | LC Subject Headings (LCSH) |
General Subdivision | sh00007615 | |
| 8. | Defects--Reporting | LC Subject Headings (LCSH) |
General Subdivision | sh99005479 | |
| 9. | Fuel systems | LC Subject Headings (LCSH) |
General Subdivision | sh00005724 | |
| 10. | Marketing | LC Subject Headings (LCSH) |
General Subdivision | sh99005342 | |
| 11. | Stability | LC Subject Headings (LCSH) |
General Subdivision | sh2001008917 | |
| 12. | Environmental aspects | LC Subject Headings (LCSH) |
General Subdivision | sh99005383 | |
| 13. | Licenses | LC Subject Headings (LCSH) |
General Subdivision | sh2002006397 | |
| 14. | Instruments | LC Subject Headings (LCSH) |
General Subdivision | sh99002257 | |
| 15. | Equipment and supplies | LC Subject Headings (LCSH) |
General Subdivision | sh00005850 | |
| Apparatus ; Apparatus and equipment ; Apparatus and supplies ; Supplies ; Apparatus ; Apparatus and equipment ; Apparatus and supplies ; Supplies | |||||
| 16. | Design and construction | LC Subject Headings (LCSH) |
General Subdivision | sh2002006372 | |
| Construction and design | |||||
| 17. | Cost of operation | LC Subject Headings (LCSH) |
General Subdivision | sh99004946 | |
| Operating costs | |||||
| 18. | Maintenance and repair | LC Subject Headings (LCSH) |
General Subdivision | sh00007535 | |
| Repair and maintenance | |||||
| 19. | Prices | LC Subject Headings (LCSH) |
General Subdivision | sh2002006518 | |
| 20. | Conservation and restoration | LC Subject Headings (LCSH) |
General Subdivision | sh99005331 | |
| Restoration and conservation | |||||
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