Kookaha Batroolka ee Semi-Graphite

Sharaxaad Gaaban:

Kaarboon go'an: 98% 98.5% daqiiqo
Sulfur: 0.1% 0.2% 0.5% 0.8% Saldhigga ugu sarreeya wuxuu ku salaysan yahay shuruudaha macaamiisha