defects are divided into four grades
It is generally judged by visualizing the allowable defects on the plywood. The grade depends on the permissible material defects, machining defects, and the requirements for splicing
Sanding plywood refers to the plywood of the sanding machine (or scraper) sanding (or scraper).
The above four levels of the panel should be sand (scrap) light, special needs can not sand (scrap) light or two sand (scrap) light.
, first class, second class, third, which, one, two, three for the general grade of the main plywood.
Appearance grade: ordinary plywood according to the processing of plywood can be seen on the material defects
