| 摘要 |
<p>A stud generally has rectangular cross section. A great deal of timber is wasted in the normal manufacture of studs. However, sawing a timber unit from a log, said unit having a cross section with three right-angled corners and one corner deviating from a right angle, and then joining two such units so that one side surface has an axial groove, enables a considerable saving in timber.</p> |
