初始化子程序
Initialize the subroutine
以上为机器翻译结果，长、整句建议使用 人工翻译 。
并阐述了该系统软件的关键部分：初始化子程序、发送子程序和接收子程序。
The key parts of the system software, which is composed of the initialization, transmission and receiver program, are described in details.
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