42 engineering, calibration of nuclear sensing apparatus, and consultation services in the field of measuring and detecting the physical properties of processing industries, such as mining, food, pulp and paper, chemical, refining, power generation, wastewater treatment, metals fabrications and hazardous waste treatment, and the custom design of nuclear sensing apparatus for use in measuring and detecting the physical properties of processing industries, such as mining, food, pulp and paper, chemical, refining, power generation, wastewater treatment, metals fabrications and hazardous waste treatment