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Installation, use and maintenance instructions.
安装，使用和维护说明。
youdao
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The guidelines include instructions on the installation and maintenance of smoke alarms.
这些准则包含烟雾警报器的安装及维护的说明。
youdao
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The guidelines include instructions on the installation and maintenance of smoke alarms.
这些准则包含烟雾警报器的安装及维护的说明。
youdao