| 摘要 |
<p>The hollow wooden structure is particularly for use where straightness is of great importance, e.g. for aligning masonry, being assembled from four strips glued together. At the gluing points the strips (1-4) are provided with teeth, and are held together solely by the glue, no nails being used. Each set of teeth can be in rack form and comprising two or more, the angle between the tooth flanks being approx. 30 deg.</p> |
