Assertion: ridging plough | /r/HasAspect | two -to-back mould boards
Facets:
Source sentences:
text: A ridging plough has two back-to-back mould boards cutting a deep furrow on each pass with high ridges either side.
text: A ridging plough has two back-to-back mould boards cutting a deep furrow on each pass with high ridges either side.