For precompressed wood, the failure arid collapse of cell walls in springwood were more easily observed in SEM micrographs, and the pit was deformed to an ellipsoid shape. 3.

• 二、以扫描式电子显微镜观察之结果得知在压缩处理之过程中，由于春材细胞壁较薄而明显地受到变形与压溃，其壁孔亦受到变形而呈椭圆形。