A.its percentage fixed carbon to that of ash
B.its percentage fixed carbon to that of volatile matter
C.its percentage fixed carbon to that of moisture
D.percentage carbon to that of hydrogen obtained in the ultimate analysis of coal.
A.its percentage fixed carbon to that of ash
B.its percentage fixed carbon to that of volatile matter
C.its percentage fixed carbon to that of moisture
D.percentage carbon to that of hydrogen obtained in the ultimate analysis of coal.