A process and apparatus for the monitoring of fire outbreaks in underground mine workings
GB1099173A
Improvements in or relating to dustlaying pastes and the manufacture thereof
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Improvements in or relating to gas sampling equipment, particularly for use underground
ES321786A1
Portable measurement instrument for the determination of gas content of air currents in under-land mines. (Machine-translation by Google Translate, not legally binding)
ES321785A1
Portable measurement instrument for the determination of gas content of air currents in under-land mines. (Machine-translation by Google Translate, not legally binding)
GB1110780A
Improvements in portable instruments for determining the gas content of underground air currents
GB1110778A
Improvements in portable instruments for determining the gas content of underground air currents
GB1110779A
Improvements in portable instruments for the determination of gases in air currents underground
