| 摘要 |
Architect can predetermine desired roof surface contour by means of a plurality of studs secured to a base support. The studs, which may carry extenders, are clipped to the desired roof surface contour. Material is added on the base support to attain this desired roof surface contour. A device such as a laser rotating on an axis defines an imaginary reference plane or cone surface, and a clipper apparatus clips the studs or extenders at a predetermined distance from the imaginary reference surface.
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