73790584
Apr 3, 1989
Dec 5, 1989
ELECTRO-OPTICAL SENSORS AND CONTROLLERS AND CONDUCTORS FOR USE WITH THE SAME, ELECTRICAL CONDUCTORS, PENETRATIONS AND FEEDTHROUGH MODULES FOR PASSING AN ELECTRICAL CONDUCTOR THROUGH A WALL, THERMOCOUPLES AND TEMPERATURE SENSORS FOR CONVERTING TEMPERATURE INTO AN ELECTRICAL SIGNAL, AND ELECTRICALLY-OPERABLE VALVES AND RELEASES
Electrical and Scientific Apparatus