Lub tshuab yog yoog rau symmetrically splitting tawv thiab mos tawv rau cov thickness yuav tsum tau nyob rau hauv kev lag luam ntawm tawv khoom, qhov dav ntawm uas yog 420 hli thiab lub thickness ntawm uas yog 8 hli. Nws tuaj yeem kho qhov tuab ntawm cov khoom sib cais los txhim kho qhov zoo ntawm cov khoom thiab lub zog sib tw ntawm kev lag luam.