So versus, you know, versus a single mine shaft with a  single weight, it's very difficult to get economies of scale.

因此，您知道，与具有单一重量的单个矿井相比，很难获得规模经济。

This method enables a continuous flow of elevator cars to operate within a single shaft — with all cars travelling in the same direction without fear of collision.

这种方法使电梯在一个竖井内连续运行，所有电梯都朝着同一个方向运行，而不用担心发生碰撞。