Tus naj npawb ntawm yob ntawm cov khoom noj ntim khoom noj nyob ntawm qhov dav thiab tuab ntawm lub yob.
Siv lub yob ntawm 1.2- 'meter'- ntev cling zaj duab xis raws li ib qho piv txwv. Txhua Qingtuan xav tau ib tug 14 {{- centimeter-ntev cling zaj duab xis tuaj yeem qhwv li 8 qingtuan. Tus lej tshwj xeeb yuav sib txawv raws qhov dav thiab thickness ntawm yob zaj duab xis. Piv txwv li, ib qho 50-centimeter-dav qhwv cov yeeb yaj kiab tuaj yeem siv los ua cov khoom noj tshiab, tab sis nws cov lej tshwj xeeb yuav tsum tau txiav txim siab raws li kev siv tiag tiag.
Tsis tas li ntawd, muaj ntau txoj kev xaiv rau cov kev qhia tshwj xeeb thiab tuab ntawm cov khoom noj yob cov yeeb yaj kiab. Cov ntaub ntawv thiab cov khoom siv sib txawv, 0.06mm thiab 0.08mm thiab cov khoom sib txawv yuav cuam tshuam tus nqi ntawm yob zaj duab xis tau siv thiab cov nyhuv ntim.
