Improved process and apparatus for strengthening or sealing the ground for bore holes, sinking of mine shafts, for digging foundations and for other constructional work below ground level and for starting up drop filter wells
摘要
申请公布号
GB697375(A)
申请公布日期
1953.09.23
申请号
GB19520001596
申请日期
1952.01.21
申请人
GEBHARDT & KOENIG-DEUTSCHE SCHACHTBAU - GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
