您要查找的是不是：
- packing density (粒状材料)堆积密度
- 材料makings
- 粒状材料bulk material
- 散粒状材料non-coherent material
- 颗粒状材料granular material
- 包装材料wrapper
- Packing问题Packing problem
- Packing维数packing dimension
- 方粒状材料diced material
- P2-PackingP2-packing
- 粒状granular
- 矩形packingRectangle packing
- 建筑材料tignum
- 圆形packing问题circle packing problem
- 生物材料biomaterial
- 三角形Packing问题Triangle Packing Problem
- 纳米材料nanophase materials
- 正交矩形Packing问题the orthogonal rectangular Packing problem
- 粒状的granulose
- 保温材料heat insulator
