| 摘要 |
A heating system for a revolving cab rotatably supported on a support structure which has a heat source. An enclosed space exists between the cab and the support structure and heated air is conducted into the enclosed space. An air duct extends between the revolving cab and the enclosed space and is offset from the axis of rotation of the cab and thus is in constant air-flow communication with the enclosed space and the interior of the cab for directing the heated air from the enclosed space and into the interior of the cab.
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