基本释义:

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