ZA731896B
(en )
1974-05-29
Improvements in or relating to ozonisers
ZA737327B
(en )
1974-10-30
Improvements in or relating to mine brattices
ZA731854B
(en )
1974-01-30
Improvements in or relating to mine roof supports
AU466853B2
(en )
1975-11-13
Improvements in or relating to mine roof support
ZA754137B
(en )
1976-06-30
Improvements in or relating to selfadvancing mine roof supports
AU463909B2
(en )
1975-08-07
Improvements in or relating to mine roof supports
ZA74423B
(en )
1974-11-27
Improvements in or relating to a mine roof support
ZA757015B
(en )
1976-10-27
Improvements in or relating to selfadvancing mine roof supports
AU464062B2
(en )
1975-08-14
Improvements in or relating to mine roof support systems
ZA721773B
(en )
1972-12-27
Improvements in or relating to self propelled mine roof supports
AU1304770A
(en )
1970-03-25
Improvements in or relating to mine roof supports
ZA734686B
(en )
1974-06-26
Mine roof supports
ZA761010B
(en )
1977-01-26
Improvements in or relating to mine roof supports
ZA716473B
(en )
1973-06-28
Improvements in or relating to mine roof supports
AU487333B2
(en )
1975-01-09
Improvements in or relating to mine roof supports
AU5782673A
(en )
1975-01-09
Improvements in or relating to mine roof supports
AU450824B2
(en )
1973-01-04
Improvements in or relating to mine roof supports
AU478885B2
(en )
1974-04-11
Improvements in or relating to mine roof support assemblies
AU3045871A
(en )
1973-01-04
Improvements in or relating to mine roof supports
AU449631B2
(en )
1971-04-29
Improvements in or relating to mine roof supports
AU4459672A
(en )
1974-01-17
Improvements in or relating to mine roof supports
AU484497B2
(en )
1975-03-06
Improvements in or relating to mine roof chocks
AU475415B2
(en )
1975-03-20
Improvements in or relating to mine brattices
AU445870B2
(en )
1971-04-29
Improvements in or relating to mine roof supporting means
AU6289569A
(en )
1971-04-29
Improvements in or relating to mine roof supports