@article{oai:u-ryukyu.repo.nii.ac.jp:02006639, author = {比嘉, 良夫 and 森, 巌 and 潮平, 寛英 and 諸見里, 眞元 and Higa, Yoshio and Mori, Iwao and Shiohira, Kanei and Moromisato, Shingen}, issue = {1}, journal = {琉球大学文理学部紀要 理学篇}, note = {This study is intended to give basic information on the elementary process of grinding of secondary cambium of sendan. The grinding equipment used was a hammer mill and ball mill shown in the following pictures. The result is summarized in the following equation which was obtained from experimental data. y=23.24x^(-0.72) e^(-0.83 x^(0.28)) The size of particle varies from 0.074mm to 0.991mm. 0.074mm