Ua tiav cov khoom siv hluav taws xob sib koom ua ke nyob rau hauv ib puag ncig kev tsim khoom xav tau cov koom haum xaiv tsa ntawm thaj chaw tsim, tswj kev siv tshuab tsis siv neeg, txhawb cov neeg ua haujlwm, thiab kuaj cov cuab yeej kom zoo. Ib qho ntxiv, thaj chaw sib dhos yuav tsum muaj cov kev cai hais txog kev tswj zoo li qub kom tiv thaiv kom tsis txhob muaj hluav taws xob tsis txaus ntseeg uas ua rau cov khoom siv hluav taws xob tsis zoo. Yuav tsum txiav txim siab yov ntawm tag nrho cov chaw sib dhos yuav tsum raug txiav txim siab kom thiaj li ua haujlwm tau zoo.
Cov khoom siv hluav taws xob sib dhos yuav tsum tau ua qee yam ntawm cov kauj ruam, los ntawm thawj cov thawj coj sib koom tes cov txheej txheem mus rau qhov kawg cov khoom txuas. Raws li qhov tshwm sim, txhua qhov chaw tsim khoom yuav tsum tau teeb tsa ntawm cov theem ntawm cov theem; cov khoom tsis tuaj yeem thauj hauv zigzag qauv thoob plaws chav tsev tsim khoom vim tias kev ua haujlwm yuav raug txo kom tsawg. Piv txwv li, thaj tsam "A" yuav tsum nyob ze thaj tsam "B" thiab "C."
Cov tshuab thev naus laus zis ua tau feem ntau ntawm cov khoom siv hluav taws xob niaj hnub no. Kev poob qis uas tsis tau xav txog tuaj yeem raug nqi ntau rau cov khw; cov tswj hwm yuav tsum muaj lub sijhawm tiv thaiv kev tiv thaiv rau txhua lub tshuab. Cov tshuab yuav tsum tau kho kom zoo thiab lubricated ib ntus dhau kom tawg yog qhov tsawg kawg nkaus. Cov neeg ua haujlwm yuav tsum tau muaj kev tiv thaiv zoo hauv kev daws teebmeem txhua lub tshuab me thaum lub sijhawm kev tsim khoom; cov neeg ua haujlwm txawj ntse tuaj yeem kho qhov teeb meem me me ua ntej nws dhau los ua qhov teeb meem tseem ceeb uas cuam tshuam rau lub sijhawm ua ke.
