Cov hlau U-puab yog ib hom hlau uas muaj ntu U-puab, feem ntau yog tsim los ntawm cov txheej txheem kub-dov lossis txias-tsim. Nws keeb kwm tuaj yeem taug qab mus rau thaum ntxov xyoo pua 20th, nrog rau kev txhim kho sai ntawm kev lag luam, qhov kev thov rau cov ntaub ntawv tsim kho tseem nce ntxiv,Cov hlau zoo li tus Umaj mam siv dav vim nws cov khoom siv zoo heev thiab yooj yim ua. Thaum xub thawj, cov hlau U-puab feem ntau yog siv rau hauv txoj kev tsheb ciav hlau thiab cov qauv tsev, nrog rau kev nce qib ntawm cov thev naus laus zis tsim khoom, nws qhov kev siv tau maj mam nthuav dav.
Cov hlau U-puab tuaj yeem faib ua pawg raws li ntau yam kev ntsuas, suav nrog cov txheej txheem tsim khoom, kev siv, cov khoom siv, qhov loj me thiab kev kho qhov chaw. Ua ntej tshaj plaws, raws li cov txheej txheem tsim khoom tau muab faib uaCov hlau U-puab kub dovthiab cov hlau U-puab txias, tus thawj yog lub zog siab, tsim nyog rau cov qauv thauj khoom, xws li cov tsev siab thiab Choj, thaum tus tom kawg yog nyias dua, tsim nyog rau cov qauv sib dua thiab kev siv kho kom zoo nkauj. Qhov thib ob, raws li cov khoom siv,Cov hlau carbon hlau U-puabyog qhov tsim nyog rau kev tsim kho dav dav, thaum cov hlau tsis xeb U-puab hlau yog qhov tsim nyog rau cov chaw tshwj xeeb, xws li kev lag luam tshuaj lom neeg thiab kev ua zaub mov, vim nws tiv taus xeb. Kev faib tawm ntau yam ntawm cov hlau U-puab ua rau nws ua tau raws li qhov xav tau ntawm ntau qhov chaw xws li kev tsim kho, choj thiab kev lag luam tshuab, qhia txog ntau yam kev cia siab ntawm daim ntawv thov.
Cov hlau U-puab muaj lub luag haujlwm tseem ceeb hauv cov tsev niaj hnub no, feem ntau pom hauv nws lub zog zoo heev thiab kev ruaj khov, yog li nws tuaj yeem tiv taus cov khoom hnyav kom ntseeg tau tias muaj kev nyab xeeb thiab kev ruaj khov ntawm lub tsev. Tib lub sijhawm, qhov tsim qauv sib dua ntawm cov hlau U-puab txo qhov hnyav ntawm lub tsev, yog li txo tus nqi ntawm lub hauv paus thiab cov qauv txhawb nqa, thiab txhim kho kev lag luam. Nws cov qauv tsim khoom thiab yooj yim ntawm kev tsim kho txhim kho kev ua haujlwm ntawm kev tsim kho thiab luv lub sijhawm ua haujlwm, tshwj xeeb tshaj yog rau cov haujlwm xav tau kev xa khoom sai.
Zuag qhia tag nrho, qhov tseem ceeb ntawm U-puab hlau hauv kev tsim kho yog pom tseeb hauv nws cov kev ua tau zoo ntawm cov qauv, cov txiaj ntsig kev lag luam, kev yooj yim ntawm kev tsim kho thiab kev ruaj khov ntawm ib puag ncig. Raws li ib qhocov khoom tseem ceebHauv kev tsim vaj tsev niaj hnub no, cov hlau U-puab tsis yog tsuas yog txhim kho kev nyab xeeb thiab kev ruaj khov ntawm cov tsev xwb, tab sis kuj muab ntau txoj hauv kev rau kev tsim qauv thiab kev tsim kho, thiab txhawb kev txhim kho tas mus li thiab kev tsim kho tshiab ntawm kev lag luam tsim kho.
Lub sijhawm tshaj tawm: Cuaj hlis-18-2024