coal mines and mining
(
9
)
testing
(
9
)
coal-cutting bits
(
6
)
coal-mining machinery
(
5
)
dust control
(
5
)
coal mines and mining dust control
(
3
)
coal-cutting bits testing
(
3
)
coal-cutting machinery
(
2
)
computer programs
(
2
)
mine dusts
(
2
)
analysis
(
1
)
carbide cutting tools
(
1
)
charbon
(
1
)
coal mines and mining dust controlcomputer programs
(
1
)
coal mines and mining dust controlcomputer simulation
(
1
)
coal mines and mining electric equipment
(
1
)
coal mines and mining research
(
1
)
coal-cutting machinery testing
(
1
)
coal-mining machinery computer programs
(
1
)
coal-mining machinery testing
(
1
)
coal-mining machinery testingcomputer programs
(
1
)
computer simulation
(
1
)
diamonds, industrial
(
1
)
drag bits
(
1
)
drag bits testing
(
1
)
electric equipment
(
1
)
electrical equipment
(
1
)
longwall mining
(
1
)
longwall mining computer simulation
(
1
)
machines
(
1
)