| Value | Category |
|---|---|
| 1 | subcontracting to other enterprise {183} |
| 2 | subcontracting by other enterprise {188} |
| 3 | collaboration in bidding for contracts |
| 4 | collaboration in utilising equipment |
| 5 | collaboration in utilising advanced equipment |
| 6 | domestic marketing |
| 7 | exporting |
| 8 | othe |