'The "hard" glossy black coal that's mined with the highest fixed carbon content is this type'
anthracite
COAL RIDGE: The hard glossy black coal thats mined with the highest fixed carbon content is this type
The "hard" glossy black coal that's mined with the highest fixed carbon content is this type
The "hard" glossy black coal that's mined with the highest fixed carbon content is this type
COAL RIDGE
anthracite
COAL RIDGE