Synonyms were used for: Steinkohlenbergbau
Search without synonyms: keywords:("Steinkohlenbergbau")
Used synonyms:
- coal mines and mining
- hard coal mining
- steinkohlebergbau
- steinkohlenabbau
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What roof conditions permit pillar recovery
Engineering Index Backfile | 1947|Keywords: Coal mines and mining -
What do we know about the explosibility of coal dust in mines
Engineering Index Backfile | 1929|Keywords: Coal mines and mining -
What do we know about the explosibility of coal dust in mines
Engineering Index Backfile | 1929|Keywords: Coal mines and mining -
Use of wetting agents for allaying coal dust in mines
Engineering Index Backfile | 1940|Keywords: Coal mines and mining -
The resistance of coal-mine entries to the flow of air
Engineering Index Backfile | 1928|Keywords: Coal mines and mining -
The resistance of coal-mine entries to the flow of air
Engineering Index Backfile | 1928|Keywords: Coal mines and mining -
The experimental mine of the United States bureau of mines
Engineering Index Backfile | 1928|Keywords: Coal mines and mining -
The effectiveness of different-size rock dusts in preventing coal-dust explosions in mines
Engineering Index Backfile | 1930|Keywords: Coal mines and mining -
The effectiveness of different-size rock dusts in preventing coal-dust explosions in mines
Engineering Index Backfile | 1930|Keywords: Coal mines and mining -
Tests on ignition of natural gas-air mixtures by permissible explosives in experimental coal mine
Engineering Index Backfile | 1949|Keywords: Coal mines and mining -
Tests of the strength of concrete stoppings designed to resist the pressure of explosions in coal mines
Engineering Index Backfile | 1930|Keywords: Coal mines and mining -
Tests of salt as substitute for rock dust in prevention of coal-dust explosions in mines
Engineering Index Backfile | 1940|Keywords: Coal mines and mining -
Tests of salt as substitute for rock dust in prevention of coal-dust explosions in mines
Engineering Index Backfile | 1940|Keywords: Coal mines and mining -
Tests of rock-dust barriers in experimental mines
Engineering Index Backfile | 1932|Keywords: Coal mines and mining -
Tests of rock-dust barriers in experimental mines
Engineering Index Backfile | 1932|Keywords: Coal mines and mining -
Tests of rock-dust barriers in experimental mines
Engineering Index Backfile | 1932|Keywords: Coal mines and mining -
Tests of barrier using rock dust in paper bags
Engineering Index Backfile | 1938|Keywords: Coal mines and mining -
Tests of barrier using rock dust in paper bags
Engineering Index Backfile | 1938|Keywords: Coal mines and mining -
Tests in experimental coal mine to determine requirements for preventing propagation of coal-dust explosions in rooms
Engineering Index Backfile | 1948|Keywords: Coal mines and mining -
Surface factors affecting pillar recovery
Engineering Index Backfile | 1949|Keywords: Coal mines and mining
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