Lub hnab ntim khoom tseem hu ua lub hnab ntim
Cov yam ntxwv ntawm cov thawv ntim
1. Lub peev xwm ntawm cov thawv hnab yog nruab nrab ntawm {1}} t, thiab cov ntawv faj s, thiab cov ntawv faj seeb}?
2. Raws li cov ntsiab lus ntawm cov khoom, lawv muab faib ua ob pawg: ntau cov khoom thauj khoom hauv hnab thiab pob me thauj khoom lub hnab ntim khoom, uas haum rau ib zaug siv thiab hloov siv.
3. Lub hnab ntim ntim tau muab faib ua peb hom raws li lawv cov duab: puag ncig, square thiab U-puab. 4. Txoj kev teeb tsa kev dai saum toj dai hom, sab dai rau ntawm dai thiab hauv qab dai yam, feem ntau nrog inlet thiab qhov hluav taws xob.
Hesheng yog ib qho kev tsim khoom lag luam tshwj xeeb hauv kev tshawb fawb thiab lub hnab ntim khoom, lub hnab ntim khoom, lub hnab ntim khoom, qhib hnab ntim hnab, ntim lub hnab ntim hnab, ntim hnab ntim. Lub tuam txhab tau ua cov cuab yeej tsim khoom thiab cov cuab yeej tsim khoom thiab ntau lawm, thiab cov cuab yeej siv tau zoo heev, uas tuaj yeem ua tau raws li cov neeg yuav khoom sib txawv.