The fixed length format, data echoplex, data sum and dual redundancy checking was adopted in data transmission to avoid the communication errors.
数据传送采用定长格式，及回送和求和双重冗余校验，以确保通信。
The fixed length format, data echoplex, data sum and dual redundancy checking was adopted in data transmission to avoid the communication errors.
数据传送采用定长格式，及回送和求和双重冗余校验，以确保通信。
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