 |
| |||
| hardworking material | |||
| difficult-to-machine material; hard-to-cut material | |||
| problem material | |||
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips