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2016
|
Invention
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System and method of pouring concrete around a flexible ventilation duct assembly.
A system for ... |
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2015
|
Invention
|
System and method of pouring concrete around a flexible ventilation duct assembly. A system... |
|
|
Invention
|
System and method of deploying a flexible duct assembly within an excavated void. A system ... |
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|
G/S
|
Non-metal ventilating ducts and connections therefor, namely, semi-rigid plastic ducts for use in... |
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2014
|
G/S
|
Conduits et des raccords de ventilation; conduits d'aération et des raccords de conduite; bennes ... |
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2011
|
Invention
|
Coupling for ventilation assembly. A coupling for a ventilation duct assembly for use with interc... |
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|
Invention
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Coupling for ventilation assembly. A coupling for a ventilation duct assembly for use with... |
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2009
|
Invention
|
Ventilation duct collet assembly. A ventilation duct assembly kit for use for forming interconnec... |
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G/S
|
Conduits (tuyaux) de ventilation pour mines souterraines. |
