With hammers fixed to a disc of dia 1.5" thick through which passes
a shaft being revolved at 3000 RPM. The hammers are enclosed in a drum, the
sides and Supper surface of which are roughened. The inner surface is undulant.
The lower part of drum is made of chrome plated brass and is detachable so that
different mesh screens (Sieves) coarse, Mediumor fine supplied with the
equipment can be easily placed.
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