Ib qhov chaw thauj khoom yog lub hom phiaj kev pabcuam ntawm cov hlua khi, feem ntau xa mus rau cov neeg siv khoom siv; Hais lus dav dav, cov khoom siv dej ntws tawm yog qhov chaw thauj khoom ntawm cov khoom siv qis. Hauv kev sib txuas lus hauv xov tooj, qhov chaw thauj khoom kuj hu ua qhov chaw hu. Tus naj npawb ntawm cov khoom siv uas muaj nyob rau hauv lub sam xauv nees yog hu ua harness peev, uas yog V, muab kev pabcuam rau N thauj khoom. Txhua qhov chaw thauj khoom pib hu tuaj yeem tuav ib qho kev pabcuam tsis siv neeg hauv lub sam thiaj.
