This popular summer squash is shaped like a slightly curved cylinder, a bit smaller at the top than the bottom.

这种夏季流行南瓜形状是稍微弯曲的圆筒状，顶部比底部稍微小一些。

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This allows the bit to drill around a central cylinder of rock, which is taken in through the bit and into the core barrel.

这样允许钻头围绕岩石的中心圆柱体钻进，并通过钻头进入取芯桶。

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This allows the bit to drill around a central cylinder of rock, which is taken in through the bit and into the core barrel.

这样允许钻头围绕岩石的中心圆柱体钻进，并通过钻头进入取芯桶。

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