mono-line control system 单线操纵系统
mono-polar line 单极线
To install the tools in the mono directory, enter the commands in Listing 1 at the command line.
要安装mono目录下的工具，需要在命令行输入清单1中的命令。
youdao
To install the tools in the mono-basic directory, enter the commands in Listing 2 at the command line.
要安装mono - basic目录下这些工具，需要在命令行输入清单2中的命令。
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