| 摘要 |
<p>A lumber planing machine with mechanisms in several embodiments whereby equal thickness planing cuts are very accurately taken from the top and bottom surfaces of sawed lumber with capability of planing at a high rate of speed while . automatically adjusting for variation in lumber thickness, and while maintaining a high level of accuracy in the planed lumber dimensions, and yet returning to former methods of specific planing cuts on the bottom surface under special circumstances.</p> |
