The striking body is made of metals, stone materials or other hard materials, and the striking body is in the shape of a round ball, a football, a polygon ball, a column or a polygon prism.

撞子是采用金属、石料或其他硬质材料加工制成的，形状为圆球形、橄榄球形、多棱球形、圆柱形或多棱柱形。

youdao

While in doing building materials business, the sellers often pile sand up with quasi-prism.

建材买卖中，售沙人常将沙堆成拟柱体。

youdao