OSAKA BOILER MFG. CO.OVS2.TR711-N220 “THERMOSTATS TYPE:TR711-N220, RANGE 40-140*C
FOR OIL TEMPERATURE CONTROL”
OSAKA BOILER MFG. CO.OVS2.TR711-N220H “THERMOSTAT TYPE:TR711 -N220H,RANGE 40-220*C
FOR HEATER SAFETY HIGH TEMPERATURE”