"Domaoline" is likely a misspelling of (a kitchen tool) or mandolone (a historical musical instrument). Depending on your interest, here are two posts covering these topics. Option 1: The Mandoline (Kitchen Tool)
A mandoline is a heavy-duty kitchen slicer that uses a stationary, adjustable blade to cut fruits and vegetables into uniform, paper-thin slices, juliennes, or waffle cuts. domaoline
It was significantly larger than a standard mandolin and featured a deep, bowl-shaped back constructed from strips of wood. "Domaoline" is likely a misspelling of (a kitchen
Part of the Neapolitan mandolin family, it was used primarily in the 18th century as a bass voice in mandolin ensembles. It was significantly larger than a standard mandolin
Over time, it was largely replaced by the mandocello , which is easier to handle and provides a more modern bass resonance.
It provides professional-level uniformity that is nearly impossible to achieve with a standard chef's knife.