| 摘要 |
<p>A plug offering a variety of dimensional tolerance absorbing properties providing for a strong hold-in plug force or outward pressure against the side wall of the drilled hole into which a plug is placed These properties come a textured surface produced by surface protuberances and/or recesses that are shaped and/or sized to provide the required hold-in force The positioning of the protuberances and/or recesses also contributes to the required hold-in force The protuberances may be ridges that make-up a series of radial concentric spaced protruding rings oriented perpendicular or parallel to the plugs axial direction of the plug The plugs come in a multitude of shapes including straight, tapered, concave, convex, stepped, wavy, any combination thereof, and/or free-form sides and round, elliptical, square, rectangular, oblong, triangular, polygonal, wavy, or any combination thereof bottom or top ends</p> |
