One who belongs to a certain grade at school. Grammatically, first grader is a compound of first grade and -er rather than first and grader, like six-footer
A machine with a centrally located blade that can be angled to cast to either side, with independent hoist control on each side An example of some of the heavy construction equipment the contractor is using at the Horsetooth Dams
A grader is used to inspect potatoes and grade them to determine if they are of an acceptable quality for export A grader can be as simple as a wooden slat with a bag on the end for accepted potatoes or it can be a more complicated conveyor-belt system that moves the potatoes towards the bag at the end as inspection is performed