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Technique and countermeasures were proposed for transformation of low yield timber forest after analysis on its causes through investigation on current resources of low yield and scattered forest.
在调查研究全省现有低产林及疏林资源基础上，着重分析了低产用材林形成的原因。并提出了低产用材林改造的技术路线与相应措施。
The deformation of the structure will mainly concentrates at the joints when structural damage occurs. The timber members remain elastic while the joint steel plates yield.
破坏时结构变形主要集中在节点上，节点钢板达到屈服强度，而木构件处于弹性工作状态；
The yield from aspen timber is best when relatively short components of sawn wood can be utilized.
当短的锯木部件可被利用时，白杨可以达到最佳产量。
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