(by Mok Chi-kit)
Palmfly is a group of gha, which helps users to build ventilation ducts.  This gha can run under RH5, 6 and 7.
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Palmfly provides components to build steel truss, calcium silicate board (Ca Si board), hanger and collar.  It makes 3D models based on size of duct, size of steel truss, etc.  Users can produce steel truss, board, etc step by step, and then export to several different packages for analysis.

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