A propeller is arranged at the lower part of cover body in a circular arch shape and is connected with the motive power steering engine in a shaft connection.
有一螺旋桨，置于圆拱形罩体的下方并与动力舵机的轴连接。
A fornltila for calculating the heading section of arbitrary three-centered arch and circular arch types was derived in this paper.
文中推导出了任意三心拱和圆弧拱巷道断面积计算的公式。
A wind outlet is punched on the arch circular peripheral surface of the exhaust shelf. At least one cloth hanger is also provided on the surrounding plane of the connection board.
出风栅的拱圆型外周圆面上冲压有出风孔，连接板 周边平面上还设有至少一个挂衣架件；
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