high-alumina
high-and-low
high-angle
high-antiknock
high-apogee
high-ash
high-attenuation
high-back
high-bake
high-bandgap
  high-bandwidth
high-bar
high-baud-rate
high-bit-rate
high-boiling
high-bypass
high-caking
high-calcium
high-capacity
high-carbon
high-chromium