SCIENTIFIC, SURVEYING, ELECTRICAL, OPTICAL, MEASURING, SIGNALING AND CHECKING APPARATUS AND INSTRUMENTS, NAMELY, MONITORS FOR ATTACHMENT TO PLANT EQUIPMENT TO CONTINOUSLY MONITOR A MACHINES OPERATING CONDITION THROUGH VIBRATION ANALYSIS; ELECTRIC AND ELECTRONIC COMPONENTS, EQUIPMENT AND DEVICES, NAMELY, ELECTRIC AND ELECTRONIC ACTUATORS AND SENSORS, NAMELY, INDUCTIVE, CAPACITIVE AND OPTO-ELECTRONIC PROXIMITY SWITCHES, STANDSTILL MONITORS, SLIP OR SYNCHRONIZATION MONITORS, ROTARY ENCODERS, LEV...

cracking catalysts for use in the oil refinery industry