Uncut layers in front of drill is called remaining layer, and its distribution of stiffness is the key factor to determine the delamination shapes of the interplies.
将钻头前端未切削的工件材料部分定义为叠合层，指出叠合层的刚度分布情况是决定各个层间分层形状的关键因素。
The stacked LVL layers needed to be connected with custom wooden bolts, but to drill the bolt holes after the wood was warped would "take time and lack in accuracy, " Ban says.
堆叠的LVL层需要与定制的木螺栓结合，但钻螺栓孔后木材被扭曲，需要花费较长时间，并且缺乏精确度，”Ban说。
The stacked LVL layers needed to be connected with custom wooden bolts, but to drill the bolt holes after the wood was warped would "take time and lack in accuracy, " Ban says.
堆叠的LVL层需要与定制的木螺栓结合，但钻螺栓孔后木材被扭曲，需要花费较长时间，并且缺乏精确度，”Ban说。
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