File:US Navy 030211-N-5362F-001 Hospital Corpsman 1st Class Kevin R. Mroz, from Phoenix, Ariz., performs a systems check on an Anesthesia Field Unit using his own pulse rate to test the machine ensuring it's working accurately.jpg
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![File:US Navy 030211-N-5362F-001 Hospital Corpsman 1st Class Kevin R. Mroz, from Phoenix, Ariz., performs a systems check on an Anesthesia Field Unit using his own pulse rate to test the machine ensuring it's working accurately.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/US_Navy_030211-N-5362F-001_Hospital_Corpsman_1st_Class_Kevin_R._Mroz%2C_from_Phoenix%2C_Ariz.%2C_performs_a_systems_check_on_an_Anesthesia_Field_Unit_using_his_own_pulse_rate_to_test_the_machine_ensuring_it%27s_working_accurately.jpg/393px-thumbnail.jpg?20091022041244)
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