Volume 24; Issue 4

2

Precast pliant lining for difficult geological conditions

Year:
1990
Language:
english
File:
PDF, 211 KB
english, 1990
4

New designs of supports for large chamber workings

Year:
1990
Language:
english
File:
PDF, 521 KB
english, 1990
10

Hydraulic drive unit for operating a gate

Year:
1990
Language:
english
File:
PDF, 319 KB
english, 1990