Rau qhov xwm txheej siv sib txawv, peb tau tsim thiab tsim ntau yam huab cua nozzles. Lub tshuab cua no tseem hu ua cua dav hlau nozzle. Qhov nruab nrab nws txau yog cov pa nkev. Feem ntau nws yog siv los ziab qhov chaw ntawm cov khoom, lossis tshuab cov hmoov av.

Koj tuaj yeem qhia peb koj cov kev xav tau, thiab peb yuav pom zoo tsim lub taub hau rau koj raws li koj xav tau. Yog tias koj xav paub ntau ntxiv txog cov ntaub ntawv qhia txog huab cua nozzle, lossis yog tias koj xav tau txais cov khoom lag luam zoo tshaj plaws, thov koj xav tiv tauj peb.