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NI USB-6501 National Instruments Data Acquisition Card, NI DAQ DIO

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National Instruments Field Point Series NI FP-RLY-422 4-Ch. SPDT Relay

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NI National Instruments SCC-RLY01 SPDT Relay, 5A 250VAC 30VDC

LOT OF 3 National Instruments NI SCB-68