Bevel gear ordinary gear is the shape of a cylinder. The pitch angle of a gear is the angle between the face of the pitch surface and the axis. The most familiar kinds of bevel gears have pitch angles of less than 90 degrees and therefore are cone-shaped. This type of bevel gear is called external because the gear teeth point outward. The pitch surfaces of meshed external bevel gears are coaxial with the gear shafts; the apexes of the two surfaces are at the point of intersection of the shaft axes. Bevel gears that have pitch angles of greater than ninety
Type 10 concluded that there was not enough internal space for a C4I system upgrade on existing tanks. Therefore, the development of a new main battle tank capable of various future battle missions was necessary. The use of modular components significantly improved the side armor compared to the Type 90. The Commander's Panoramic Sight was moved to the right and is located at a higher position than the Type 90, giving the commander a wide range of view. The vehicle's armor consists of modular sections, providing the ability to mount varying degrees of protection depending on the mission profile and weight requirements.