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PURPOSE : A transportable raw yellow earth crushing and grading device is provided to improve property of raw yellow earth since microorganism is alive inside the raw yellow earth.CONSTITUTION : A transportable raw yellow earth crushing and grading device comprises : a body frame(10) which is installed at a certain height from the surface by using wheels; a crusher(20) which is installed on the body frame and is equipped with a plurality of crush blades on the outer circumference thereof; a grinding device(40) which is installed in the lower part of the crusher and grinds the raw yellow earth dropping through a screen; a roll screen in which a net(22) is formed in order to sort the raw yellow earth powder; a rotary shaft pivotally installed inside the roll screen; a screw blade(55) which transfers the raw yellow earth powder rearward; and an outer shell(62) which discharges the raw yellow earth powder outside.COPYRIGHT KIPO 2011