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access gallery /ɐbˈɪsəl ˈpleɪn/ n

中文：检查廊道

中文 · 检查廊道Español · galería de accesoFrançais · galerie de visite
Meaning：Underground passageway that provides access to various parts of the dam so that it can be inspected and maintained.
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Hydroelectric plant cross-section

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