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單項選擇題

A single piece（） fitted with bronze rings guides the piston in the cylinder liner.

A.piston skirt
B.piston crown
C.guide way
D.cross-head

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單項選擇題

A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.

A.between；to
B.either；or
C.from；to
D.neither；nor

單項選擇題

A separate piston cooling system is used （） any contamination from piston cooling glands to the piston cooling system only.

A.to help
B.to limit
C.to protect
D.to remove

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