他用另一块石头当锤子去击打那个金色的凸块。
He used another rock as a hammer to hit the gold-colored lump.
复数个凸块是设置于该主动面。
Pluralities of projections are disposed on the active surface.
转碟表面密布有梯形凸块，圆形凹坑和通气孔。
The surfaces of the discs are covered with trapezoidal protrusions, circular indentations and air holes.
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