30.the graduated scale to be provided for circulating lube oil tank

在循环润滑油柜内应有该度尺。

How, it may be asked, in the foregoing and in innumerable other instances, can we understand the graduated scale of complexity and the multifarious means for gaining the same end.

可能有人会问， 在前面和无数其他情况下， 我们如何理解复杂性的分级规模和达到相同目的的多种手段。