Hawlaha:

1. Uumiga ka neefso uumiga si aad u hubiso cadaadis gaar ah oo uumiga ku jira uumiga;

2. Kordhi cadaadiska (cadaadiska) si aad u abuurto xaalado uumi heerkulka sare;

3. Rari qaboojiyaha si uu qaboojiyaha u dhammaystiro wareegga qaboojiyaha.

Astaamaha:

1. Waxtarka tamarta aadka u saraysa: hufnaanta tamarta ayaa 12% ka saraysa kombaresarada piston-ka ee ugu horumarsan suuqa

2. Kalsooni heer sare ah: Qaybo yar oo dhaqaaqa, iyo naqshadaynta dabacsanaansan ee shatiga leh ee kombaresarada axial iyo radial waxay siisaa iska caabin aan hore loo arag ee shoogga dareeraha ah iyo dulqaadka wasakhda.