| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to get a low cost optimum environment in a building. SOLUTION: In an ice skating arena 13, an iceskating rink 14 forming a link shape is installed in a building 17 having a fixed roof 26, a movable roof 18 is provided to be vertically movable in the fixed roof 26, By covering the periphery of the iceskating rink 14 after going down the movable roof 18, a tubular enclosed space 36 can be formed. COPYRIGHT: (C)2005,JPO&NCIPI
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