Elongated object adapted to be driven into a resistant medium such as soil and a method for facilitating the driving in of such an object专利检索- .具有柔性衬套或可膨胀保持装置的岩心接收器专利检索查询-专利查询网

Elongated object adapted to be driven into a resistant medium such as soil and a method for facilitating the driving in of such an object
申请号	US55921866	申请日	1966-06-21	公开(公告)号	US3399737A	公开(公告)日	1968-09-03
申请人	STICHTING WATERBOUWKUNDIG LAB;			发明人	PHILIP BEGEMANN HEINRICH KARL;
摘要
权利要求
说明书全文