Assertion: machine's table | /r/HasAspect | controllable permanent magnet
Facets:
value: for use with magnetic stock
type: PURPOSE
value: typically
type: DEGREE
Source sentences:
text: Surface grinder, which has a head that is lowered to a work piece, which is moved back and forth under the grinding wheel on a table that typically has a controllable permanent magnet (magnetic chuck) for use with magnetic stock (especially ferrous stock) but can have a vacuum chuck or other fixture means.