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。
2
According to needs and delivery medium, can be used two kinds of mechanical seals and packing seal, and the structure of these two kinds of interchangeability.
根据需要和输送介质，可采用机械密封和填料密封两种，且这两种结构具有互换性。
3
In the paper, interchangeability of gases, impact of gas-changing on gas burner performances, gas replacement measure and method are studied.