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Medical devices
Any instrument, appliance or machine that facilitates the prevention,diagnosis and treatment of illness, physical or mental injury, by a medical professional.
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granny ring
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the smallest of the three chainrings on a triple chainring.
Clean Air Act Amendments of 1990
Energy; Coal
Originally passed by the U.S. congress in 1963, it was amended in 1970 and 1990. The 1990 amendment addressed issues such as emissions trading, acid rain, ozone depletion.
twisting
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Convincing a customer that trades are necessary in order to generate a commission. This is an unethical practice.
retrograde motion
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Backward (westward) motion of the planet among the stars, resulting from the fact that it is viewed from the moving earth. It is the motion that a planet has when its right ...
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