Early in the morning, in the Yongan subway station in Beijing, China's first subway line - Beijing Metro line 1 successfully established the first shield door.
清晨，在永安地铁站，中国的第一条地铁线路-北京地铁1号线成功地建立了第一个屏蔽门。
Early in the morning, in the Yongan subway station in Beijing, China's first subway line - Beijing Metro line 1 successfully established the first shield door.
清晨，在永安地铁站，中国的第一条地铁线路-北京地铁1号线成功地建立了第一个屏蔽门。
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