Nkawm khau sab saum toj

dab tsi yog tawv sab hauv khau

Tawv sab sauv hauv khau hais txog cov khoom siv los npog sab saum toj ntawm cov khau. Tawv yog ib qho kev xaiv nrov rau cov khau siab vim nws cov durability, yooj thiab zoo nkauj thov. Tawv Upper tuaj ntau hom thiab qib. Puv-grain tawv yog cov tawv zoo tshaj p

dab tsi yog ib sab hauv khau

Ib sab hauv khau yog ib qho tseem ceeb uas txiav txim siab tag nrho qhov zoo thiab kev xav ntawm nkawm khau. Sab saum toj yog ib feem ntawm cov khau uas npog cov ntiv taw, ob sab, thiab sab nraub qaum. Nws feem ntau yog ua los ntawm tawv, cov khoom siv hluavta

dab tsi yog lub Upper ntawm ib nkawm khau

Lub Uppers ntawm ib nkawm khau hais txog ib feem ntawm cov khau uas npog cov ko taw. Nws yog ib feem ntawm cov khau uas tuaj rau hauv kev sib cuag ncaj qha rau ntawm daim tawv nqaij. Uppers feem ntau yog tsim los ntawm ntau yam ntaub ntawv xws li tawv, hluavta