ballas 的定义
Mineralogy.
- a spherical aggregate of small diamond crystals used for drilling and for various industrial purposes.
更多ballas例句
- Item an M of provune gollde with a grette Ballas & a Dyamond.
- This cannot be distinguished from certain fragments obtained in the Neolithic cemetery at Ballas.
- A rough example of No. 44 was found at Ballas, used anciently as a lamp with floating wick.
- The crucial case at Ballas was the secondary burial of a Libyan found in one of a group of stairway mastabas.
- The sides of one Neolithic tomb at Ballas were lined with bars of this kind.