Question: What was found, in the Cango Valley along with Circular stone hearths and calcified dung remains of domesticated sheep, that is a cutting tool shaped somewhat like an axe that dates back to the stone age?
Sentence (from "Turning"): The cutting of faces on the workpiece (that is, surfaces perpendicular to its rotating axis), whether with a turning or boring tool, is called "facing", and may be lumped into either category as a subset.
Relevant evidence: No