湖中心有三个小岛：阮公墩、湖心亭和小瀛洲。
In the center of the lake are three isles - Ruangong isle, Mid-lake Pavilion and Lesser Yingzhou.
施工前放出墩身中心线和外轮廓线的准确位置。
Before the construction exact location of Central Line and external contour line of the pier is set out.
该刮泥机为中心支墩式中心传动，扁吸嘴自吸式吸泥；
It has a supporting block in the centre with central transmission. The sludge is removed by spontaneous imbibition through flat nozzle.
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