The external wall of Beijing residence are usually dark gery lath brick, its typical characteristics is grey bricks and tiles.
北京民居的外墙通常用深灰色的条形砖，青砖灰瓦是其典型的特征。
The external wall of Beijing residence are usually dark gery lath brick, its typical characteristics is grey bricks and tiles.
北京民居的外墙通常用深灰色的条形砖，青砖灰瓦是其典型的特征。
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