Use cases
* Usable for all buildings with probability firing .
 * Usable after ventilators.
* Usable in two fuzzy and motory models with retor spring .
* to be resist  on fire up 2 houres .
Abilities
* Able to be make of  two forms as single part and two part wing .
* to be made  of  Alominium sheet, steal stainsel .
* Able to be made  of spring .