Mysticue unit

There are two mysterious machine of unknown purpose in one of casemates. What it is and what is for, it is not known for sure, because all personnel gone, records were lost or destroyed, wiring was cut, nameplates rusted and can not be read even with a magnifying glass...
PS: there are reports that it is the equipment for the destruction of ammunition by blasting. This conclusion has been made on the nameplate on the remains of equipment. Who knows...