In sleeping rooms an electric reading lamp should be installed at the head of each berth.
在卧室里，应在每个铺位的床头安装一个台灯。
In sleeping rooms an electric reading lamp shall be installed at the head of each berth.
在卧室里，应为每个铺位安装一个台灯。
In sleeping rooms an electric reading lamp shall be installed at the head of each berth.
在卧室里，应为每个铺位安装一个台灯。
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