| 摘要 |
Wallboard having a skin outer surface is attached to wall and ceiling framing by nails having heads with a convex bottom surface and a concave top surface. A driver blade is used having an outer end with a shape complimentary to the concave nail top surface and a diameter which is larger than the nail head such that no sharp edges are presented to the wallboard skin around the nail head, thereby avoiding cutting the paper skin.
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