分析表明：对带缺口的肋环型单层网壳，增加斜杆对结构性能有很大的改善，用钢量反而降低；
The results show that: it has good improvement when some pole in the shell, at same time, it reduced the investment;
分析表明：对带缺口的肋环型单层网壳，增加斜杆对结构性能有很大的改善，用钢量反而降低；
The results show that: it has good improvement when some pole in the shell, at same time, it reduced the investment;
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