Size reduction of moulding powders, waxes, resins & gums are done

1.	Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill.
A.	cage
B.	hammer
C.	both (a) & (b)
D.	id) neither (a) nor (b)
Answer» D. id) neither (a) nor (b)

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Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill.

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