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GB775639A
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A new and improved flexible pipe
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GB779567A
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Framing of shafts, particularly blind shafts
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GB785063A
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Connection for lagging irons for use in mines
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GB740023A
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An arrangement for adjustably connecting guide rails on the cross beams of mine shafts and the like
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GB722202A
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Improvements in lagging members for mine galleries and the like
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GB699994A
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Collapsible pit-props
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GB699938A
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A device for the adjustable connection of lagging members for mine shafts with one another
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GB706796A
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Coupling joint for lagging irons used in mining operations
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GB683259A
|
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Air-pipe couplings
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US2656141A
|
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Mine support
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GB680349A
|
|
Improved means for setting two-part pit props
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GB679646A
|
|
An improved portable drum winch, more especially for withdrawing pit props or the like
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GB679479A
|
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Roof support for use in mines
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DE713716C
|
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Longitudinal and transversely movable pipe connection
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GB512613A
|
|
Improvements in and relating to joints in pipes for fluids under pressure
|
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US2112266A
|
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Elastic pipe connection for low tension working pressure or vaccum
|
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GB462787A
|
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Improvements in pipe connections for low pressure or vacuum pipes
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