Spiral ribbon tov khoom
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Txhim khu kev ua tau zoo kauv ribbon tov khoom
Spiral ribbon tov khoom yog tsim los ntawm lub ntsiab ncej, ob txheej txheej los yog ntau txheej ribbon.Lub kauv ribbon yog ib qho sab nraud thiab ib sab hauv, nyob rau hauv cov lus qhia sib txawv, thawb cov khoom rov qab thiab tawm mus, thiab thaum kawg ua tiav lub hom phiaj ntawm kev sib tov, uas yog tsim rau nplawm cov khoom siv lub teeb.
