Additionally, have put forward the Suggestions in protecting casing, saving workover fee, reducing costs and increasing economic benefits.
为今后如何进一步保护好套管，节省大修费用，降低成本，提高经济效益等方面提出了建议。
All devices for switching, protecting and controlling are installed on a base plate installed in a separate steel sheet casing.
所有的开关，保护，控制装置皆分别装置在各控制盘上。
The different protecting methods for the carrier pipes prevented with casing pipes from corroding during 1970s -1990s in the northeast China oil pipeline are respectively introduced.
介绍了东北输油管道自70年代至90年代穿越段管道套管的防护方式。
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