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Sigma KEE - RailroadCompany

铁路公司

Any TransportationCompany whose services include Transportation by Train.

Relationships
Parents	运输公司	A Business whose services include Transportation, e.g. a RailroadCompany, an airline, a cruise ship line, etc.
Children	三级铁路	ClassIIIRailroad is the subclass of RailroadCompany whose instances have an average annual gross revenue below $20.5 million UnitedStatesDollars.
	二级铁路	ClassIIRailroad is the subclass of RailroadCompany whose instances have an average annual gross revenue between $20.5 and $256.4 million UnitedStatesDollars.
	classI铁路	ClassIRailroad is the subclass of RailroadCompany whose instances have an average annual gross revenue above $256.4 million UnitedStatesDollars.