experimental research: the average thickness of corium of the normal group were 0.0mm after days.

实验研究：正常组小鼠真皮层(平均厚度0.0mm)，附属结构毛囊、汗腺(平均.／Lp)，硬皮病模型组真皮层增厚(平均厚度0.mm)，胶原纤维轻度增生，附属结构毛囊、汗腺明显减少或缺失(平均9.／Lp)。