| 摘要 |
After the trailer has a wall in place for the enclosure thereof, an open-ended casing for the heater is installed in an opening in the wall, with the open end of the casing adjacent to the relatively outside face of the wall. Also, a structural frame is formed on the body of the trailer about the opening, adjacent the aforesaid outside face of the wall, and an outer wall for the enclosure is juxtaposed on the opposite side of the frame from the first mentioned wall, with an opening in the outer wall that registers with the open end of the casing. Then, an apertured cover is registered with the open end of the casing, adjacent the opening in the outer wall, and the casing and cover are secured to the frame.
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