Thanks for that clarification. And what then is your understanding of the difference between kosher and glatt kosher?
Disclaimer: I am not a shochet or Bodek, this is my layman's understanding based on discussions with a shochet
A lung that has no sirchas is "glatt Beis Yosef." (I've been told that this is 1 in 100 in American animals and even then it's because the Bodek pnim wasn't careful enough when checking)
If it has sirchos that are small enough that they can be easily removed without making a hole in the lung it is Glatt. (The question is what is considered "easily removed." There is no black and white answer, and it can change based on circumstances)
If the sircha can be removed without leaving a hole in the lung it is Kosher. (All of the stories you hear of bringing the lung to the Rov are in this category.)
In America where, for many years, the animals belonged to goyim, and the butcher only bought it if it was kosher, it became possible to be makpid on only eating Glatt