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procedure and device for subsea drilling work without anvendning of divers
procedure and device for subsea drilling work without anvendning of divers
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机译:无需潜水员就可进行海底钻井作业的程序和装置
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摘要
The end of the drill support frame supports a front guide that is penetrates the loose material. It is used to guide the drill string and to control the introduction of a lining or charging tube. This is introduced into the drill tube immediately after the drill string has been withdrawn and before the plant is moved to its next position.
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