AU108377B2
(en )
1939-09-07
Improvements relating to coal and rock cutters ofthe chain type
AU89339A
(en )
1939-09-07
Improvements relating to coal and rock cutters ofthe chain type
CA373029A
(en )
1938-04-12
Coal cutter chain
AU109059B2
(en )
1939-11-23
Improvements in or relating to rock drills
AU111892B2
(en )
1939-07-27
Improvements in and relating to rock and like drills
AU112173B2
(en )
1941-01-09
Improvements in and relating to rock and like drills
AU220539A
(en )
1939-11-23
Improvements in or relating to rock drills
AU111639B2
(en )
1940-10-10
Improvements in rock crushers
AU190339A
(en )
1939-07-27
Improvements in and relating to rock and like drills
AU561439A
(en )
1941-01-09
Improvements in and relating to rock and like drills
AU111963B2
(en )
1940-11-02
Improvements in or relating to explosives suitable for coal blasting
CA380501A
(en )
1939-04-04
Rock pulverizer
CA383663A
(en )
1939-08-29
Rock drill
CA383182A
(en )
1939-08-08
Rock drill
CA383664A
(en )
1939-08-29
Rock drill
AU497939A
(en )
1940-10-10
Improvements in rock crushers
AU111056B2
(en )
Improvements in or relating to explosives
AU117261B2
(en )
1943-07-29
Improvements in or relating to high explosives
AU512739A
(en )
1940-11-02
Improvements in or relating to explosives suitable for coal blasting
CA381559A
(en )
1939-05-23
Phosphate rock recovery
AU106947B2
(en )
1939-03-30
Improvements in or relating to rock crushers
AU107613B2
(en )
1939-06-15
Improvements in or relating tothe breaking of coal or like minerals
AU108624B2
(en )
1939-10-05
Improvements in or relating to chain dredge buckets
CA368532A
(en )
1937-09-07
Rock drill
CA366505A
(en )
1937-06-01
Rock drill