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The end of the hole is hemispherical.
小孔端面成半球状。
youdao
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A structure or other object resembling such a hemispherical roof or vault.
类似于穹隆或圆屋顶的结构或物体。
youdao
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A structure or other object resembling such a hemispherical roof or vault.
类似于穹隆或圆屋顶的结构或物体。
youdao