It introduces one kind of new technology — "ladder" -like sealing off a borehole by slipping casting.

提出了一种针对深钻孔的注浆封孔新方法——“阶梯”式注浆封孔方法。

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This paper analyses theoretically and technologically, the reason of barrel tooth holders sealing off , of produced gas hole and cold crack.

从理论和工艺上分析滚筒齿座开焊的原因、气孔的产生和怎样减少气孔生成、冷裂现象生成及其予防。

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After sealing off, please contrast the packing list, check whether all radom files and enclosures are complete, whether the machine is intact.

拆封后，请对照装箱单，检查所有随机文件及附件是否齐全，机器是否完好。

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Firefighters arrived within moments, sealing off the area and evacuating the house in case any further debris fell from the roof.

BBC: Vortex from plane landing at Heathrow damages roof

Then there is Halliburton, which was contracted to cement the production liner in the well casing, effectively sealing off the reservoir from the well bore.

FORBES

But its decision to build a five-kilometre (three-mile) chain-link fence sealing off the centre of the old city of Quebec created an unfortunate symbol of exclusion.

ECONOMIST: A cautious yes to pan-American trade