Once the rotors are fitted, they'll cut through the material, creating a channel that reduces the clearance between the propeller top and duct wall.
一旦转子安装，他们会通过减少材料，创建了一个通道，降低了螺旋桨的顶部和管壁之间的间隙。
To ensure the safety of navigation and bridge, it should be considered to calculate the minimum navigable clearance dimensions of bridge in bridge construction and channel construction.
合理地确定通航桥梁的最小净空宽度，保证船队航行和桥梁安全，是桥梁建设和航道建设均应重视的问题。
This allows the slider (4) to better utilize the clearance height of the slider channel (5).
这就允许滑杆(4)更好地利用滑杆通道(5)的间隙高度。
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