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Nôl i Ganlyniadau
National Coal Board Production Department
Diwydiant
Planning the Ventilation of New or Reorganised Collieries (booklet)
National Coal Board Production Department
2001.1/1033
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Diwydiant
Some tests on Yielding Props in German Collieries (booklet)
National Coal Board Production Department
2018.42/52
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Diwydiant
Equipment at the 1958 Essen Mining Exhibition (booklet)
National Coal Board Production Department
2018.42/162
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Diwydiant
Planning the Ventilation of New or Reorganised Collieries (booklet)
National Coal Board Production Department
2018.42/125
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Diwydiant
Safe Practice in Using Armoured Flexible Conveyors (booklet)
National Coal Board Production Department
Waterlow & Sons Ltd.
2001.1/772
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Diwydiant
Statistics of Mechanised Output for the year 1961 (booklet)
National Coal Board Production Department
2018.42/192
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Diwydiant
Wedag Baum Jigs at Neumühl Colliery in Germany (booklet)
National Coal Board Production Department
2018.42/68
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Diwydiant
A Combined Gearhead for Bottom Loading Belt Conveyors on Double Unit Faces (booklet)
National Coal Board Production Department
2018.42/53
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Diwydiant
The Holman "Silver Three" Wet-Drilling Machine with "Autolock" Backhead (booklet)
National Coal Board Production Department
2018.42/149
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Diwydiant
Induced Draught Cooling Towers in Germany (booklet)
National Coal Board Production Department
2018.42/37
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Diwydiant
Mine Car Couplers (booklet)
National Coal Board Production Department
2018.42/184
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Diwydiant
Comparative performances of various Spray Heads used in British Coalfields (booklet)
National Coal Board Production Department
2018.42/166
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