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- Mechanical wear (9)
- Friction (5)
- Tribology (4)
- Polymers and polymerization (2)
- Machine parts--Failures--Handbooks, manuals, etc (1)
- Machine parts--Maintenance and repair--Handbooks, manuals, etc (1)
- Machinery--Maintenance and repair--Handbooks, manuals, etc (1)
- Materials--Testing (1)
- Microstructure (1)
- Strength of materials (1)