Retractable roof structure lets building have indoor and outdoor using functions. It is so wildly used in modern sport facilities.
开合屋盖结构可以使建筑物同时具有室内和室外两个使用功能，已经成为现代体育建筑的宠儿。
Retractable roof structure lets building have indoor and outdoor using functions. It is so wildly used in modern sport facilities.
开合屋盖结构可以使建筑物同时具有室内和室外两个使用功能，已经成为现代体育建筑的宠儿。
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