Ventilation Rack & Pinion
| Item | Material | Type | Spec. |
| Ventilation Rack straight | Zinc plate sheet | Straight | L=1650/2000mm/customized |
| Ventilation Rack Curved | Zinc plate sheet | Curved | L=1050/1250mm /customized |
| Truss Rack | Zinc plate sheet | Straight | L=1050/1200mm |
| A Type pinion rack drive | Copper/Nylon sleeve | A type | Ratio 1:1, 1” |
| Truss pinion rack drive | Zinc plate sheet | truss use | Ratio 2.76:1 |