Assertion: mandible's surface | /r/HasProperty | flat
Facets:
Source sentences:
text: The upper surface of the upper plate is flat and forms a supporting bearing for the sleeve block 35 which is sleeved upon the pivot arm.
text: Surfaces.The lateral surface (Fig. 176) is flat and marked by oblique ridges at its lower part; it gives attachment throughout nearly the whole of its extent to the Masseter.
text: Swivel mount 62 has surface 71 which provides a bearing surface for condyle ball 36 when it is in the occludent position and this surface may be flat or slightly inclined.