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Adjustable ventilation blade structure

Adjustable ventilation blade structure

Mine local ventilation fan cylinder support machine

Mine local ventilation fan cylinder support machine

Aluminum blade locking mechanism

Aluminum blade locking mechanism

Sealed component air vent patent

Sealed component air vent patent

Suitable for wind turbine blade pitch adjustment mechanism

Suitable for wind turbine blade pitch adjustment mechanism

A silencing structure for a local fan

A silencing structure for a local fan

A detachable structure of a local fan silencer

A detachable structure of a local fan silencer

A novel blade fixing device

A novel blade fixing device

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