用有限状态机机制，在话单文件信息表中表示话单文件状态的变化，以便查询。

Change of call file status presents in call file information table by Finite State Machines mechanism.

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对整个话单处理流程，采用数据库事务机制，保证话单文件解析、入库、汇总的完整性。

Integrating of call parsing, storing and collecting is implemented, via database transaction in the call processing.

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