Lub teb chawsraj tsis muaj seamlesstus nqi tag nrho ruaj khov. Tus nqi ntawm cov khoom siv raw khoom ruaj khov. Raws li rau lub Hoobkas yeeb nkab, lub Hoobkas yeeb nkab seamless tseem ruaj khov ib ntus, thiab cov zis ntawm lub Hoobkas yeeb nkab nce ntxiv, tab sis lub Hoobkas chaw khaws khoom tau txo qis rau ob lub lis piam sib law liag, thiab qhov kev nyuaj siab ntawm cov khoom muag tau txo qis lossis qhov tig tau tshwm sim. Kev sib tsoo dub yav tom ntej kaw ntsuab,daim hlauTus nqi ua haujlwm ruaj khov, ob peb hnub ntawm kev loj hlob tau qeeb qeeb, tab sis tus nqi yeeb nkab seamless hauv lub sijhawm no ntawm tus nqi tsis nce es tsis txhob poob, qhov laj thawj tseem ceeb yog tias feem ntau ntawm lub tebchaws muaj rau lub caij tawm ntawm lub caij, cov tub luam loj rau kev xa khoom lag luam. Raws li cov hlau lag luam downstream ntau yam, tag nrho cov lag luam tsis muaj zog xyoo no, tsis muaj kev tsav tsheb zoo pom tseeb, kev ua lag luam tom qab lossis tswj hwm qhov poob siab tsis muaj zog, ntxiv rau qee lub khw tseem ceeb tseem muaj kev tswj hwm foob, muaj qee qhov cuam tshuam rau kev lag luam.Lub raj tsis muaj qhov txuasCov tub lag luam rau cov khoom muag me me raws li qhov xav tau, cov khoom muag hauv zej zog kom tswj tau qib dav dav. Zuag qhia tag nrho, tus nqi tsis muaj teeb meem yuav khiav hauv qhov ntau me me.