BRISTOL
INDICATING, RECORDING, AND CONTROLLING INSTRUMENTS; NAMELY, ELECTRICAL METERS, SUCH AS VOLTMETERS, AMMETERS, [ WATTMETERS, FREQUENCY METERS; ] LIQUID-LEVEL MEASURING INSTRUMENTS, TELEMETERS, PRESSURE CONTROLLING INSTRUMENTS, THERMOMETERS, TEMPERATURE CONTROLLING INSTRUMENTS, FLOW METERS, FLOW CONTROLLING INSTRUMENTS [ MOTION AND OPERATION RECORDERS ] , PRESSURE-MEASURING INSTRUMENTS; NAMELY, PRESSURE INDICATORS AND RECORDERS; [ APPARATUS FOR INDICATING AND/OR RECORDING THE TIME AND DURATION O...
Cancelled · January 18, 1950 · 71591014 ·