The roll is compound centrifugal cast roll, it's outer high-Cr cast iron, inner graphite cast iron.

此辊外层为高铬铸铁，芯部为球墨铸铁，采用离心复合铸造。

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The brick outer walls were ten feet high.

NEWYORKER: The Kingpins

There is an inner belt, extending from about 100 to 10, 000 kilometers high, and an outer belt extending from 13, 000 to 60, 000 kilometers altitude.

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And when the solar wind is stronger, it is better at shielding the earth from high-energy charged particles from outer space known as cosmic rays.

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