Lumber visual grading is one of the most important lumber grading systems in North America,which finishes lumber grading by watching and measuring the lumber superficial quality or characteristics.

• 目测分等方法是北美一种很重要的锯材分等体系,即依据目测分等规则通过肉眼观测方式测定木材的缺陷状况进而确定规格材的材质等级。