Exported functions are represented by function descriptors that are modified by the loader to enable the AMR changing service to front-end exported services.
通过函数描述符表示导出的函数，由加载器对这些描述符进行修改，以使得 AMR 能够将服务更改为前端 导出服务。
2
Or the three-way valve may send the pressurized liquid to a hydraulic motor driving a feed conveyor while the front-endloader is not being used.