Leather is by ossein type piece the material of poriferous fiber shape that poriferous matrix makes record.

皮革是由类型片状多孔基质构成的多孔纤状物质。

Profile is poriferous cavity, advocate the liner steel that there is Lengza armor plate to be made inside antrum, in order to increases the strength of window of model steel door.

型材为多孔空腔，主腔内有板制成的内衬，用以提高塑门窗的强度。