Beside having similar properties to mollusc shell nuclei, the new pearl nuclei possess some advantages such as white color, strong luster, round shape and cheap cost.

 
  • 这种珠核物化性质与现有贝、蚌壳珠核相近,具有颜色白、光泽强、外形圆和价格低廉等特点。
今日热词
目录 附录 查词历史