Tough and lightweight compared to other protective casing on the market.

和市场上其他保护性外壳比起来，更结实，更轻。

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One end of the protective casing is provided with a flaring for the butt-joint of the heat-insulation case.

在保护套的一端设有扩口，用于保温套间的对接。

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Its drilling system USES a 380-ton protective casing over the wellhead that is about the size of a six-story office building.

它的钻探系统采用了重380吨、约六层办公大楼大小的保护罩(防爆装置)来保护井口。

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Hydraulic fracturing involves the injection of fluid consisting of approximately 99.5% water and sand (the rest consists of common industrial or even household chemicals or materials) through wells constructed with protective casing and cement, into producing shale formations.

FORBES: Why Anti-Fracking Groups Are Shifting Their Story From Water To Air Quality