indicator sequence造句

Intercepts of traffic which had an 8-letter indicator sequence before the usual 5-letter groups led to the suspicion that a 4-rotor machine was being used.
Rambler also was an early pioneer in offering an automatic shift indicator sequence ( P R N D2 D1 L, where if one selected " D2 ", the car started in second gear, while " 1 " started in first gear ) on its " Flash-O-Matic " transmission which is similar to today's " PRNODSL ", made mandatory in 1968, which requires a neutral position between reverse and drive, while General Motors still offered a shift selector that had reverse immediately next to low gear ( PNDSLR ) well into the 1960s.
It's difficult to find indicator sequence in a sentence. 用indicator sequence造句挺难的