Khoom npe: silicon carbide foob nplhaib
Kev nyuaj: 30 degree-90 degree
Siv: cov nplhaib foob pob hluav taws xob
Kev piav qhia txog khoom
Ntau Yam Khoom

Cov Ntaub Ntawv Txog Lub Tuam Txhab

Cov Khoom Siv Hoobkas

Tsev khaws khoom

Cov Ntawv Pov Thawj













