众多的材料体系包括运输系统材料，通信体系材料或者建筑系统材料。
Within any system such as transportation, communications, or construction, numerous materials systems exist.
外球面轴承优先适用于要求设备及零部件简单的场合，例如用于农业机械、运输系统或建筑机械上。
The spherical bearing applies to request priority equipments and parts of the simple situations, such as used for agricultural machinery, transportation system or construction machinery.
应用推荐