Hello again, siptree,
In the image that you have posted, I cannot read the details. I'm pretty sure that I can explain the notations, but I want to see them clearly first. Though I'm on the road right now, I know that I have some printout pages from BT 112 in my "samples" book at home. If no one else has answered you before then, I'll post again next week after checking my printouts.
Cheers,
Westoe