Backwater hole and then right to the water flow convergence, the flow along the spiral case.

然后与右回水孔流来的水汇合，顺着蜗壳流动。

youdao

Pulp in the heavy mineral grains settling faster convergence along the spiral gradually inward edge of the end, the form of concentrates produced.

矿浆中的重矿粒沉降快，沿收敛的螺旋线逐渐向内缘，最后以精矿形式产生。

youdao

This creates a virtuous upward spiral of convergence as we lock ever more deeply onto the problem.

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