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对钢质防火卷帘门主轴设计问题进行了探索，提出了主轴合理挠度值及相应计算的简化公式该公式满足工程使用要求，有一定的实用价值．
The design of steel fire shutter door spindle was explored, and the reasonable deflection value of main shaft and the simplified formula of corresponding calculation were put forward. This formula can meet the engineering requirements and has certain practical value.