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。

Message Digests are secure, one-way hash functions that convert arbitrary length data into fixed-length check sum / hash code.

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部件的识别(一)由一个自动生成的校验，在法律上相关软件，已宣布固定在型式检验。

Part (a) of the identification consists of an automatically generated checksum over the legally relevant software that has been declared fixed at type examination.

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叶轮经过静平衡校验，用轴套和两侧的轴套螺母固定，其轴向位置可以通过轴套螺母进行调整。

The impeller is static balanced, and it is fixed with sleeve and nuts aside, its axial position can be adjusted by sleeve nut.

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