入口和出口结构
Entrance and exit structure
以上为机器翻译结果，长、整句建议使用 人工翻译 。
平衡鼓和交叉流道的轴向间隙为入口小、出口大的锥形 结构，防止被流经间隙的砂子阻塞；
The axial gap of the balancing drum and a cross channel is a cone-shaped structure with a small entrance and large exit and can prevent from being obstructed by sand flowing through the gap;
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