H - Beams thiab i - Beams muaj qee qhov sib txawv tab sis tseem muaj kev sib txawv hauv kev ua tau zoo. Ob qho tib si muaj "Kuv" {{{{3} Tus ntoo khaub lig thiav, tab sis h} ci ntsa iab feem ntau muaj qhov nqaim tau nrog cov ntaub tuab. Nyob rau hauv cov nqe lus ntawm lub zog, h {{8} Be} Beams feem ntau muaj qhov todional zoo dua thiab tom qab kev ruaj ntseg. Qhov no ua rau h - Beams ntau haum rau cov ntawv thov uas cov hom kev ruaj khov yog qhov tseem ceeb, xws li hauv ntev ntev. Kuv- Beams, ntawm qhov tod tes, feem ntau yog siv nyob rau hauv cov xwm txheej uas lub chaw thauj khoom tseem ceeb hauv ib qho kev tsim kho nyob hauv cov chaw nyob. H - Beams tuaj yeem faib cov khoom seem uas muaj ntau yam lus qhia, thaum kuv} Beams tau txais ntau dua hauv kev tuav hluav taws xob hauv ib lub dav hlau. Nyob rau hauv cov nqe lus ntawm qhov hnyav {{}} rau {19} wabts} Cov kab muaj zog ntau dua, tsis muaj txiaj ntsig zoo ntxiv, kev siv tau ntau dua rau cov khoom siv yooj yim, kev siv hluav taws xob.
