auto - ball
- auxiliary compressor
- auxiliary contact
- auxiliary crosscut
- auxiliary equipment
- auxiliary face equipment
- auxiliary fan
- auxiliary fan ventilation
- auxiliary feeding conveyor
- auxiliary haulage
- auxiliary measures to protect the roadway
- auxiliary mine-rescue team
- auxiliary motor
- auxiliary operation
- auxiliary relay
- auxiliary services supply
- auxiliary shaft
- auxiliary supplies
- auxiliary supply
- auxiliary switch
- auxiliary terminal box
- auxiliary ventilation
- auxiliary winch
- availability
- availability factor
- availability of coal
- availability of diagnostic information
- availability rate
- available
- available capacity
- available ground water
- available power
- avalanche
- avalanche baffle
- average
- average crushing
- average depth
- average dround pressure
- average earnings
- average output
- average unit pressure
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