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单词 oil ring
释义

oil ring

noun

1
: a seal engravers' finger ring having a small receptacle containing a mixture of oil and diamond dust used in replenishing the engraving tool
2
: ring oiler
3
: a piston ring designed to secure proper distribution of lubricating oil over the length of cylinder wall traversed by the piston
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更新时间:2024/12/23 13:36:08