How to Link a CSS file in Angular in Userfriendly Explanation

I have 12 component and their share the same code in their local css file

  .column {
    flex: 100px;
    padding: 10px;
  }

What course of action should I do in order to apply DRY?

Info:
*The code should be in a single css file and to be linked in each component.
*I would like the file and its code to be inside of a angular project.
*I don't know hot to do it. Based on the instruction below, they are not explicit about how to do it.
Load external CSS into component

Thank you!