本文对定向结构刨花板表面粗糙问题从工艺和设备上进行深入的研究，通过气流铺装施加表面细化材料以提高板面平整度。
In the article, the surface roughness of Oriented Strand board has been researched from the air forming, applying the surface fine material to improve the board-surface smooth.
分子最稳定的定向是在沿表面的分子吸引力最大处。
The most stable orientation of the molecular attraction lie along the surface.
目的寻找骨髓源性肝干细胞的表面标记，进行定向分化及脾内移植研究。
Objective To identify the surface marker of bone marrow-derived liver stem cells, isolate the stem cells, and investigate the differentiation and intrasplenical transplantation of the stem cells.
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