1) classification by appearance
外观分等
1.
According to the standards for the classification by appearance in China, Japan and America, larch test pieces are classified by appearance based on strength and are inspected using stress wave.
根据中国、日本、美国的外观分等标准对落叶松试材进行了以强度为基础的外观分等,然后对试材进行应力波检测,分析比较不同外观分等结果与应力波检测的相关关系。
2) appearance rating
外观等级
3) appearance classification
外观分类
4) apparent distribution
外观分布
5) visual grading
外观分级
6) Plywood--Specification for classification by appearance of plywood for general use
胶合板 普通胶合板外观分等技术条件
补充资料：外观
①事物的外在形象：他外观宽绰，其实已经负债累累｜这栋旧宅外观尚可，而内部已被白蚁蛀空。②外貌：外观整洁｜既要注重外观，更要注重内在的修养。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条