It was indicated that the steady-state diffusion coefficients of vapour in direction parallel to panel surface of OSB were about 10 times as large as that in direction perpendicular to panel surface.

• 结果表明，定向结构板内平行于板面的水蒸气稳态扩散系数约是垂直于板面的水蒸气稳态扩散系数的10倍左右。