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Lead bricks are commonly used as radiation shielding. Lead shielding refers to the use of lead as a form of radiation protection to shield people or objects from radiation so as to reduce the effective dose.
â¢ Erasing Shields â is a thin sheet of metal or plastic composed of different sizes and strips of holes used to erase errors made by pens or pencils without damaging the lines near those being erased â¢ Bow Instrument â is a smaller type of compass, used for drawing circles and arcs which are not possible in a regular compass.