Ahụmahụ afọ 20 n'ubi a
Aha ngwaahịa: Rotary Airlock Valve na-ehicha onwe akpaaka
Ojiji: Sistemụ nnyefe pneumatic dị mma na adịghị mma
Ihe: Enwere ike ịhazi ya (igwe anaghị agba nchara ma ọ bụ ductile Iron)