Swelling efficiency in vertical direction of compressed direction was the smallest in tangential, the biggest in radial and middle in non standard direction compression.
压缩木压缩方向的垂直方向上的膨胀率，弦向压缩最小，径向压缩最大，非标准向居中。
2
The results showed that the grading bamboo strand lamination is a low-swelling material. The swelling of parallel to grain, radial and tangential is lower than that of timber and LVL.