21.220 - Flexible drives and transmissions
Show all standards in this group (38)
| ICS | Field | Number of standards |
|---|---|---|
| 21.220.10 | Belt drives and their components | 25 |
| 21.220.20 | Cable or rope drives and their components | 2 |
| 21.220.30 | Chain drives and their components | 11 |