a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves
2つのシャフトが異なる速度で回転するようにするかさ歯車
differential
relating to or showing a difference; "differential treatment"
違いに関する、または、違いを見せている
differential
involving or containing one or more derivatives; "differential equation"