1. los ntawm cov khoom deg kho: dej txiav tawm ntawm cov khoom ntawv hlau yaig heev nyob rau hauv qhov chaw thiab nto du. Ua tawm ntawv yog cratered uas txom nyem cov khaubncaws sab nraud povtseg kho deg, kho deg tsis sau cov deg los tsis xws luag. Ib co npuas me me, los yog daj, thiab hais txog. Cov no yog cov.
2. los ntawm cov khoom ntawm ntug thiab nrog rau: tom qab tau zoo ntawm cov khoom ntau lawm tias yog Burr khiav, tej yam khoom tsis scraping tes los yog dab tuag; zoo dua ntawm cov pwm uas siv ntev lawm tsis tawm ntawm cov khoom yuav huv Burr ntawm li mus rau ua kev; cov khoom uas kho mob tawm tsis rau deg ua nyob ncaj qha assembled txoj kev txom nyem, zoo li no mus yuav tej yam qhov nqi, nrog tuaj yuav scraping tes los sis mus qhib, qhov no hu ua Jerry.
