NUCLEAR GAUGES, NAMELY, MATERIAL DENSITY GAUGES, AND LEVEL DETECTOR CONTROLLERS

Electrical and Electronic Apparatus and Instruments and Structural Parts and Structural Fittings Therefor-Namely, Sources of Ionizing Radiation-Namely, Radioactive Isotopes Housed in a Shielded Container which Emit Gamma Rays, X-Rays, Beta Rays or Neutrons; Monitoring Equipment-Namely, Radiation Detectors and Associated Electronic Devices, Display, Recording, Switching or Relay Devices, All Associated with the Electronic Devices and All for Ionizing Radiation; Sources, Detectors, Gauges, Read...

CAMERA EXPOSURE CONTROLS FOR TIMING