| 1 | Knowledge of General maintenance of twin screw extruder and mixers. | |
| 2 | Oil and chemical device, all have screw compressor. | |
| 3 | Photoelectric sensor and double-screw feeder can control the feeding forcibly and equally. | |
| 4 | And so the screw turns until those without leverage will buy. | |
| 5 | Recirculating twin ball tracks in the screw and on the rails provide greater accuracy. |