oilstone उदाहरण वाक्य

"' Scary sharp "'is a method of sharpening woodworking tools with sandpaper instead of conventional methods of oilstone or waterstone sharpening.
The CIA assigned the cryptonym " Aquatone " to the project, with the USAF using the name " Oilstone " for their support to the CIA.
Natural oilstones are quarried in Arkansas _ they are often called Arkansas stones _ and are graded as hard, or fine, and soft, or coarse.