Method and device for maintaining tools at a level
摘要
A tool is controlled below a water surface by carrying out a level comparison between a level-fixed measuring element postioned on land and a level-varying measuring element belonging to the tool and by adjusting the level of the tool with respect to a floating body in dependence upon said comparison.
申请公布号
US4584784(A)
申请公布日期
1986.04.29
申请号
US19810320063
申请日期
1981.11.10
申请人
WOLTERS, TJAKO A.;RAVESTEYN, CORNELIS J.;RUYTER, THOMAS J.
发明人
WOLTERS, TJAKO A.;RAVESTEYN, CORNELIS J.;RUYTER, THOMAS J.