Because the workers bring Back Joint BS 29 C BS 24 C thapthi Joint is where the stage route reaches the hole. So I don't see the difference of Deatil to GPL, so Joint Sub Beam errors.
The worker brought the Back Joint BS29C overlaid the Joint BS24C which long hole to hole as well. Thus making it impossible to see the difference of the specimen, thus providing Deatil GPL Joint Sub Beam wrong.
Due to the Back practitioners Joint BS29C to snipe Joint BS24C which hole to hole distance equal. Why didn't the difference of the target, it makes Deatil GPL Joint Sub Beam wrong.