Through summarizing the shapes of nephrite gravels, it is found that nephrite gravels mostly are tabular with lower length/width ratio.

 
  • 摘要通过对软玉子料形状总结,发现子料多呈扁平状,其长宽比较小,磨圆好的子料形状可分为11类。
今日热词
目录 附录 查词历史