A machine using 2 parallel rotating cylinders covered by a belt that move each other in tandem, for the purpose of transporting objects on the moving belt
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Category: <span>B</span>
Cavities formed along strata caused by natural or manmade forces
Solid rock attached to the earth
Generally describing layers of sedimentary rock
A mill utilizing a hammer and swing arm apparatus to pulverize ore
Dropping prices or value in a financial market
Production of economic minerals from beach deposits including beach placers
A circular centrifugal device which accelerates electrons with a rotating magnetic field
Concentrations of wave and wind formed mineral sand deposits, usually zoned from the high water level
An elementary particle emitted from a nucleus during its radioactive decay, having a single electrical charge and mass equal to 1/1837 of a proton