| русский | rus-000 |
| труднообрабатываемый материал | |
| English | eng-000 | difficult-to-cut material |
| English | eng-000 | hard-to-cut material |
| English | eng-000 | hard-to-machine material |
| English | eng-000 | heavy-duty material |
| English | eng-000 | material of low-machinability rating |
| English | eng-000 | non-free-cutting material |
| English | eng-000 | poor machinability material |
| English | eng-000 | problem material |
| English | eng-000 | tough material |