Piston rings are used to:
A. Seal the combustion chamber
B. Remove excess oil from the cylinder wall
C. Both A and B
D. None of the above
Answer: C
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a. stable b. dynamic c. flexible d. variable
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____________________ prototyping is the process of creating a solid model in a computer-controlled machine using a CAD design file.
Fill in the blank(s) with the appropriate word(s).
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