Well, they represent, in order Gruppen Technical Officer and Grupen Beim Stab.
Beim Stab means "At the Saff," so I am assuming Staff Officer, likely of the Gruppen. There were various Staff Officer duties, and I do not know which this officer was charged with.
Gruppen Technical Officer usually had an engineering degree and was a weapon technical officer, likely specialized in the aircraft, but definitely in some weapon as far as I can tell. I'm guessing he took care of aircraft technical issues, such as aircraft systems or electrical issues beyond the ability of the crew chief. If he couldn't fix it or adres it somehow, the aircraft was likely cannibalized or scrapped.