Hais tias koj faib ib qho hollow-tub sab vertically hauv ib nrab. Sab hauv, koj yuav pom peb txheej thib ib - ob Veneer lossis sab nrauv cov khaubncaws sab nraud thiab sab hauv honeycomb-qauv duab los qhia. Txuas cov no peb txheej yog ntoo thav duab.
Lub honeycomb-qauv duab los qhia txheej txheem ua kom cov qhov rooj tsis kim thiab sib dua. Tab sis nws yog huab cua puv, lub ntsiab lus nws yog ntau dua nquag mus rau suab hloov dua li lwm lub cev lossis cov ntoo ntoo.
