BE605863A
(en )
1961-11-03
Device for laying props in mine galleries
FR1293474A
(en )
1962-05-11
Device for laying props in mine galleries
FR1202560A
(en )
1960-01-12
Valve device for hydraulic mine props
FR1319372A
(en )
1963-03-01
Walking pile for mine support
BE615419A
(en )
1962-07-16
Removable support device for mine props
FR1280137A
(en )
1961-12-29
Hydraulic device for setting up a mine prop
FR1272244A
(en )
1961-09-22
Support device for a mine roof
FR1312473A
(en )
1962-12-21
Anchor device for mining
FR1135203A
(en )
1957-04-25
Mine prop clamping device
FR1276329A
(en )
1961-11-17
Improvements made to props for mining galleries and the like
FR1258759A
(en )
1961-04-14
Progression device for mining
FR1284655A
(en )
1962-02-16
Lining panels for mine galleries
FR1394937A
(en )
1965-04-09
Device for the protection of workers working in the boring of mine galleries, tunnels and the like
BE611590A
(en )
1962-06-15
Device for the support of a mine gallery
FR82755E
(en )
1964-04-17
Anchoring device in particular for roof bolts of underground galleries
FR1521519A
(en )
1968-04-19
Mine drift retaining device by means of anchor seals
BE603612A
(en )
1961-09-01
Stanchion for mine galleries
BE603540A
(en )
1961-09-01
Mine prop
AT239727B
(en )
1965-04-26
Retractable support device for moving longwall mining
FR1274805A
(en )
1961-10-27
Folding ventilation hose for mine and tunnel sites
FR1289337A
(en )
1962-03-30
hydraulic mine prop
FR1208557A
(en )
1960-02-24
Alternate advancement device for the working face conveyor and mechanized support with extendable props for mine galleries
FR1251175A
(en )
1961-01-13
Mine roof supports
FR1250852A
(en )
1961-01-13
Anchoring device for the support of underground excavations
FR84470E
(en )
1963-02-19
Anchoring device, in particular for bolting to the roof of mine galleries