16.It is an important guiding significance for industrial policy formulization to understand the scale and efficiency of timber processing enterprises.
18.Deforestation (disafforestation) The permanent removal of forests, especially by means of logging for commercial timber and clearing for agriculture and human settlement.
20.Three radial sawing patterns, sectorial radial sawing models of quarter timbers, trisected timbers and hexsected timbers are presented in this paper.