There's a rich vein of literary history which insists on their interchangeability.

文学史上很多人都支持他们是可以互换的。

What is interchangeability?

什么是互换性？

Single scale single, poor interchangeability.

秤台单一需单配，互换性差。

Very good interchangeability of parts, easy to replace.

零件互换性好，易更换。

High precision requirements, interchangeability should also be good.

精度要求高，互换性也应当好。