Message Digests are secure, one-way hash functions that convert arbitrary length data into fixed-length check sum / hash code.
消息摘要是一个安全的、单向的哈希函数，把任意长度的数据转化成固定长度的校验和/哈希码。
Methods:Application of the small plate with a solid fixed-line treatment of 63 cases of mandibular fractures in patients with clinical data review and sum up.
方法：对应用小型接骨板行坚固内固定治疗的63例下颌骨骨折患者的临床资料进行回顾总结。
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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