Rub the abrasive wheel by pressing it hard against a


Obtain a small grinding wheel or a piece of a large wheel.

(a) Using a magnifier or a microscope, observe its surfaces and compare them with Fig. 26.9.

(b) Rub the abrasive wheel by pressing it hard against a variety of flat metallic and nonmetallic materials. Describe your observations regarding the surfaces produced.

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Civil Engineering: Rub the abrasive wheel by pressing it hard against a
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