Yuav tswj tus txheej txheem zoo thiab thaum twg yuav ua cov txheej txheem tshuaj xyuas? Daim duab qhia no meej rau saib .Qhov cov txheej txheem tseem ceeb rauCylindrical ZogOb Chav Ntiaj Teb Sab Hauv Nplhaib Iav .Which cov ntawv tshaj tawm yuav tsum tau tsim tau nyob rau txhua txheej txheem?
Peb tau nruab nrog cov khoom siv tshuaj xyuas tshiab xws li xim av & Sharple peb-ntsuas ntsuas, ntsuas hluav taws xob, ntsuas qhov ntsuas kom paub tseeb tias qhov kawg tshuaj xyuas thiab ua kom tiav.
Ua ntej txhua qhov kev xa khoom, peb yuav muab cov lus qhia hauv qab no rau cov neeg yuav khoom los tshawb xyuas cov ntsiab lus kom ntseeg tau tias txhua tus tau nkag siab zoo thiab ua haujlwm zoo.
1)Cov Khaub Ncaws Hnav Ntshav
2)Tshaj Tawm Tshaj Tawm
3)MAterial Certial
4)HNoj tshuaj
5)Daim Ntawv Tshaj Qhia Raug
6)PDuab kos duab, yeeb yaj duab