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Formal Language:

Sigma KEE - Compass

KB Term:

罗盘

A Device that indicates the direction of the various DirectionalAttributes with respect to the device.

Relationships
Parents	有内用物体	Any SelfConnectedObject that expresses content. This content may be a Proposition, e.g. when the ContentBearingObject is a Sentence or Text, or it may be a representation of an abstract or physical object, as with an Icon, a Word or a Phrase.
	设备	A Device is an Artifact whose purpose is to serve as an instrument in a specific subclass of Process.