tag:blogger.com,1999:blog-3218524178230712938.post7189247680711024493..comments2024-03-28T12:37:29.643-07:00Comments on modeling the SP: Route cards — 7Tony Thompsonhttp://www.blogger.com/profile/11593061828601275378noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-3218524178230712938.post-3382536564457519552018-04-22T14:27:06.243-07:002018-04-22T14:27:06.243-07:00Interestingly, the ARA diagram identifies this ite...Interestingly, the ARA diagram identifies this item as "Defect And Routing Card Board". With the 1930 date this must predate the requirement for a designated and separate defect card holder.Bob Chaparrohttps://www.blogger.com/profile/13080273776793131441noreply@blogger.com