IRREVERSIBLE STEERING GEAR n.
A steering gear, esp. for an automobile, not affected by the road wheels, as when they strike an obstacle side ways, but easily controlled by the hand wheel or steering lever.
CHAFING n.
arm, either by coals, by a lamp, or by hot water; a portable grate for coals. -- Chafing gear (Naut.), any material used to protect sails, rigging, or the like, at points where they are exposed to friction.