问答题 翻译：The success of nontechnical methods averages 4.4% or about one third as success as technical methods.

问答题 翻译：They are built on the same principle as the supertankers the wall of ship is also the wall of the oil tanks.

问答题 翻译：Of primary importance is the fact that the prognosis represents a firm commitment as to drilling engineers ultimate responsibility.