oil retainer是什么意思

中文翻译油环档圈，润滑油保持环，护油圈

网络释义

1)oil retainer,油环档圈，润滑油保持环，护油圈2)oil-ring retainer,油环档圈3)oil ring,油环护油圈4)oil-retaining ring,润滑油保持环5)oil retainer ring,润滑油档油环6)oil control ring,护油圈;护油环