Changes in surface appearance are often more of a problem than is fabric rupture in pile fabrics such as corduroy, velvet, or velveteen . 对某些织物说,例如起绒织物包括灯芯绒、平绒和棉平绒等,外观的改变比起织物的破损还要重要。
Plywood - classification by surface appearance - general 胶合板.按表观分类.总则
Plywood - classification by surface appearance - softwood 胶合板.按表观分类.软木
Plywood - classification by surface appearance - hardwood 胶合板.按表观分类.硬木