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Apply construction glue to contact points of cornice to wall and ceiling.
在线板背面将天花与墙面接触的地方涂上万能胶。
youdao
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Vault: in building construction, an arched structure forming a ceiling or roof.
拱顶：房屋建造中用拱作成的天花板或屋顶。
youdao
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Vault: in building construction, an arched structure forming a ceiling or roof.
拱顶：房屋建造中用拱作成的天花板或屋顶。
youdao