手机话费记录，通过状态机实现不同通话类型的手机话费记录功能-Their phone records, through the state machine to achieve different types of their phone call logging

基于CAN总线的声波测井地面数据接口与传输系统设计，HD15530使用手册及相关论文。-Based on CAN Bus data interface surface acoustic logging and transmission system design, HD15530 manual and related papers.