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  • Manual parallel Damper
  • 1041

Use cases  
* commercial , residential buildings , hospitals and industrial  oil petroliom , gass.
* to be made  of  Alominium sheet, steal carbon  , steal stainsel .

Abilities
* Able to be make of  two forms as single part and two part wing .
*Able to be control as manual and motory .
* able to be make of collateral, reciprocal wings.
* Able to be instal on ventilat systems .