Ducts can be resized independently. Circular or rectangular duct can be specified.

可以分别调整各管道大小. 可指定是圆形管或矩形管.

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Rectangular branch takeoff duct with adjustable transition. Circular or rectangular duct can be specified.

具有可调转换的矩形分支引出管道. 可指定为圆形管道或矩形管道.

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Vanes can be shown or hidden. Circular or rectangular duct can be specified.

可显示或隐藏叶轮. 可指定是圆形管或矩形管.

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