n. 油磨刀石

[机] 油磨石

[ noun ]
a whetstone for use with oil
<noun.artifact>

Oilstone \Oil"stone`\, n.
A variety of hone slate, or whetstone, used for whetting
tools when lubricated with oil.

Whet \Whet\, n.
1. The act of whetting.

2. That which whets or sharpens; esp., an appetizer. ``Sips,
drams, and whets.'' --Spectator.

{Whet slate} (Min.), a variety of slate used for sharpening
cutting instruments; novaculite; -- called also {whetstone
slate}, and {oilstone}.