Nta: Cov ntsiab lus ntau cov pa roj carbon, qis tshauv, siab hluav taws xob & thermal conductivity. Tsawg leej faj, porosity tsawg thiab cov ntsiab lus tsis muaj volatile. Qhuav, huv thiab nruab nrab-sized ures
Qhov loj me: 0.2-24-24-2mm, 1-5mm, 3-8mm, 5-15mmor raws li cov neeg yuav tsum tau ua.
Cov: Hauv 25kg me me Hnab, 1mt lub hnab loj, lossis raws li tus neeg yuav khoom.