关于PROE论文前言的翻译

Box Gearbox very complex internal and external structure, as used to support inclusive movement parts or other parts, so often the internal cavity. Commonly used in the cavity box to install the drive shaft, gears and rolling bearings. Cabinet from time to time in the use of boxes to be installed together, so at the end of the box, covered with many of the installation hole, pin hole, threaded hole. In order to co me tight tank flange also often, in order to increase the stiffness of box. Parts are generally strengthen the tendons, due to the structure of the complex, so for the casting, casting process, many structures, such as casting round, and so on Draft gradient. Gearbox cover more features of the model, mainly used in the tensile characteristics, shell characteristics, strengthen the tendons features, hole features, chamfering, back rounded and so on, the characteristics of the array, mirror, in order to facilitate the need to create a base-level modeling , the base axis and