Lub npe khoom: silicon bearing
Kev nyuaj: 30 degree-90 degree
Siv: Rau kev lag luam
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

Lub npe khoom: silicon bearing
Kev nyuaj: 30 degree-90 degree
Siv: Rau kev lag luam




