Guys tell me what are the functions of the gauges in the center of the cockpit here:

I know that the top and the gauge below the top is throttle and RPM but whats the use of the 3rd and 4th gauges?
Yes, my DC-10 is near to complete. The only things that I haven't make that stops me from uploading the aircraft is the flaps, front gear door and it's details, and of course. cockpit