retractable roof structure

• 开合结构

retractable roof structure的用法和样例：

例句

1. Delaminations may reduce the buckling load of the laminated structure greatly.
   脱层的存在将会大大降低层合结构的屈曲载荷。
2. It has been suggested that magnesium form a chelated structure with the phosphate groups.
   有人指出，镁与磷酸基因能构成螯合结构。