Assertion: hammer's surface | /r/HasProperty | flat
Facets:
value: usually
type: DEGREE
value: in turn
type: TEMPORAL
Source sentences:
text: The impacting surface of the tool is usually flat or slightly rounded; the opposite end of the impacting mass may have a ball shape, as in the ball-peen hammer.
text: The impacting surface of the tool is usually flat or slightly rounded; the opposite end of the impacting mass may have a ball shape, as in the ball-peen hammer.
text: When conducting the test, the hammer should be held at right angles to the surface, which in turn should be flat and smooth.