Valve ea serurubele e sebetsang hantle ea NSEN e sebelisoa haholo ts'ebetsong ea lik'hemik'hale, metsing, femeng ea motlakase jj. 'Me e loketse mocheso o phahameng, e na le bophelo bo bolelele ba ts'ebeletso, ha e bapisoa le valve ea serurubele e kopaneng.
Bakeng sa lipotso mabapi le lihlahisoa tsa rona kapa lethathamo la litheko, ka kopo re siele imeile ea hau 'me re tla ikopanya le uena nakong ea lihora tse 24.