1. Koob Insertion Lub kaum sab xis yuav tsum tsis txhob siab tshaj 45 degree kom tsis txhob nkag mus hauv npag npag.
2. Sim kom tsis txhob noj cov tshuaj uas ua rau cov tawv nqaij ua kom tawv nqaij.
3. Cov tshuaj hnyav, yuav tsum tau hloov, pauv.
4. Rau kev txhaj tshuaj tsawg dua 1 ml ntawm cov kua, yuav tsum siv 1 ml koob txhaj tshuaj kom paub tseeb tias koob tshuaj txhaj yog qhov tseeb.
