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Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?()

单选题
2022-11-04 14:24
A、The chromium will not wear out the piston rings
B、The chromium strengthens the liners in the way of the scavenging air ports
C、Chromium eliminates the need for oil scraper rings
D、Pores in the plating aid in maintaining the lube oil film
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正确答案
D

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