protective casing

基本解釋

Already free of the protective casing around his foot, Rooney is walking without discomfort and will step up his training next week.
現(xiàn)在魯尼腳上的保護裝置已經(jīng)拆除，他已經(jīng)可以無障礙的走路了，下周就可以恢復(fù)訓(xùn)練。
The two-stage cementing technique was used for the protective casing of the horizonal well in Tahe oil field because of a long open-hole interval in secondary spudding.
塔河油田水平井由于第二次開鉆裸眼段長，技術(shù)套管采用雙級固井技術(shù)。
The protective casing plays the role of protecting the electronic thermometer and the electronic watch at one side face of the electronic thermometer is convenient for mastering time by people.
保護套能對電子溫度計起到保護的作用；電子溫度計一側(cè)面的電子表方便人們掌握時間。
ip.com

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