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National Coal Board Production Department
Diwydiant
Procedure for the Assessment of Workable Reserves (booklet)
National Coal Board Production Department
2017.38/506
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Diwydiant
Power Stowing of Ripping Dirt, A method of Slushing on Longwall Faces (booklet)
National Coal Board Production Department
2018.42/55
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Diwydiant
Automatic Control Devices for Conveyor Belt Sprays (leaflet)
National Coal Board Production Department
2018.42/169
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Diwydiant
The Bi-Di Cowl for Anderton Shearer Loaders (booklet)
National Coal Board Production Department
2018.42/196
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Diwydiant
Water Tanks for Dust Supression in Drilling (booklet)
National Coal Board Production Department
2018.42/112
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Diwydiant
Experience in Compressed-Air Blasting (booklet)
National Coal Board Production Department
2018.42/171
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Diwydiant
The use of Prestressed Concrete (leaflet)
National Coal Board Production Department
2018.42/101
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Diwydiant
Basic Face End Layouts (booklet)
National Coal Board Production Department
2001.1/928
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Diwydiant
Pneumatic Stowing from the Surface at Crookhall Colliery (booklet)
National Coal Board Production Department
2018.42/130
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Diwydiant
Rapid Installation of an Armoured Conveyor on a Prop-Free Front (booklet)
National Coal Board Production Department
2001.1/1037
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Diwydiant
Automatic Rope Haulage Clip for attachment to Mine Cars (booklet)
National Coal Board Production Department
2018.42/66
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Diwydiant
Further developments in Pulsed-Fusion Firing (leaflet)
National Coal Board Production Department
2018.42/167
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