1. Vim tias qhov chaw vuam vuam siv lub tshuab hloov pauv hloov pauv nrog kev tswj tsis muaj qhov nrawm, tag nrho cov kev tswj hwm qhov nrawm yog dav dua, tsis yog qhov raug yog qhov siab, tab sis lub zog pib kuj tseem loj heev.
2. Cov txheej txheem steel tub ntxhais uas muaj qhov tshwj xeeb tau tsim los siv, tag nrho kev sib txhuam quab yuam yuav ntau dua, kev pab lub neej yuav muaj txiaj ntsig zoo, thiab tag nrho lub peev xwm nqa tau lub peev xwm yuav tsim nyog.
3. Cov yam ntxwv ntawm tus vuam vuam siv yog siv lub thawv sib xyaw ua ke, uas txhim kho ob qho kev nruj thiab lub peev xwm nqa tau.
Plaub, tag nrho cov txheej txheem kev tsim khoom kuj tseem sib piv, txhua lub qhov taub yog qhov zoo nyob hauv qhov ncaj thiab kev sib txig sib luag, thiab qib kev tsis txaus los ntawm kev tsim khoom raug txo qis me me.
5. Ntxiv mus, tus tuav vuam tuaj yeem hloov kho lub kaum sab xis ntawm cov menyuam raws li qhov loj ntawm cov haujlwm hauv txoj kab uas hla, uas tuaj yeem ua tau raws li qhov xav tau ntawm kev txhawb nqa thiab tig tsav rau cov khoom sib txawv ntawm txoj kab uas hla.