Any of various thick, dark, sticky substances obtained from the distillation residue of coal tar, wood tar, or petroleum and used for waterproofing, roofing, caulking, and paving.
Due to combinative of all Wood, it takes up the 80% paving surface in Occident's Projects.
由于它结合了其它木地板的优点，故在欧美国家，三层实木地板已占工程总铺装面积的80%。
3
Old brick has been used as paving for the rear garden. Most of the natural wood that has been used for the construction has been obtained from cultivated forests.