| 摘要 |
A mirror unit suitable for exterior mounting on an automobile includes a glass member with a reflecting surface, a thermally-conducting metal plate, a self-regulating electrical resistance heater body of material of positive temperature coefficient of resistivity having one side mounted on one side of the plate in thermally and electrically conducting relation to the plate, terminal means electrically connected to the opposite side of the heater body, and means securing the plate to the glass member for enclosing the heater body therebetween to heat the glass member for defogging the reflecting surface thereof.
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