EP0191162A3
(en )
1989-03-08
Method of software protection
GB2195939B
(en )
1990-11-07
Member for percussion drilling and method of protection therefor
ZW12387A1
(en )
1987-09-30
Mining method
GB2194903B
(en )
1990-03-28
Corrosion protection tape
ZA873617B
(en )
1987-11-16
Method and equipment for cooling of underground mine-shafts and/or machinery installed therein
GB8628165D0
(en )
1990-04-25
Mine for protection from moving objects
DE3373123D1
(en )
1987-09-24
Bore-hole pump and method for its protection
GB2212514B
(en )
1992-07-08
Cathodic protection of subterranean pipes
PL269796A1
(en )
1989-07-10
Method of protecting mining equipment against deformations
DE3562936D1
(en )
1988-06-30
Method and device for modifying the cross-section of a gallery, a tunnel or the like
PL240257A1
(en )
1984-07-30
Method of protecting galleries and workings
PL268136A1
(en )
1989-04-17
Method of protecting roof beams against lowering
GB8824193D0
(en )
1988-11-23
Method of protecting surface from tool damage
HUT45317A
(en )
1988-06-28
Method and cutting charge for cutting objects of arched profile
PL257257A1
(en )
1987-11-02
Method of protecting steel surfaces
PL261077A2
(en )
1987-08-24
Method of protecting metal parts
PL264332A1
(en )
1988-10-27
Method for protecting underground pipelines against detrimental consequences of mining damages
PL273266A1
(en )
1989-12-27
Method of improving effectiveness of cathodic protection systems
ZA874756B
(en )
1988-02-24
Mining method
PL261204A1
(en )
1988-04-14
Method of installing a lighting protection system and lighting protection system as such
PL263282A3
(en )
1988-09-01
Method for removing and protecting underground voids
PL280692A1
(en )
1991-01-28
Method of protecting mine depresion chambers
PL265432A1
(en )
1988-11-10
Shield for protection of roof and longwall face areas
IL82677A0
(en )
1987-11-30
Method and assembly for protection of ground against erosion
GB8616227D0
(en )
1986-08-13
Protection of surfaces against weather