their distillation; bituminous substances; mineral waxes section- chapter ( to ) section vi - products of the chemicals or allied industries chapter chapter description chapter- inorganic chemicals; organic or inorganic compounds ofprecious metals, of rare-earth metals, of radioactive elements of isotopes...
their distillation; bituminous substances; mineral waxes section- chapter ( to ) section vi - products of the chemicals or allied industries chapter chapter description chapter- inorganic chemicals; organic or inorganic compounds ofprecious metals, of rare-earth metals, of radioactive elements of isotopes...