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If the patient's chin is positioned too low during the panoramic exposure:
Army Corps of Engineers
A federal agency under the Department of Defense in the United States, responsible for public engineering, design, and construction management, including improvements to natural resources and infrastructure.
Clean Air Act
A wide-ranging federal legislation in the United States designed to control emissions from both stationary and mobile sources in order to safeguard public health and the environment.
Acid Rain
Precipitation containing harmful amounts of sulfuric and nitric acids resulting from the atmospheric emission of sulfur dioxide and nitrogen oxides.
Scrubbers
Pollution control devices designed to remove particulates and/or gases from industrial exhaust streams.
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