材分八等,dividing material as eight grades英语短句,例句大全

材分八等,dividing material as eight grades
lumber grading木材分等
3)Grade of dimension lumber规格材分等
4)Wood grade木材分等(分级)
5)Timber strength grading锯材强度分等
6)eight layer plate material八层板材
1.Weaving manufacturing display,the result of eight layer plate material has specified thickness and enough shearing stress between two layers,and can used for industrial territorys such as motor vehicle,airplane cushion and so on.为得到具有三维立体结构的八层板材预制件,采用下接上的角联锁结构进行层间连接的织制方法。