Use APKPure App
Get Duct Equivalent Diameter old version APK for Android
यह ऐप आयताकार, अंडाकार और तिरछे डक्ट के लिए समतुल्य गोल व्यास की गणना करता है
This app is simply Build to Calculate Equivalent Round Duct Diameter of Rectangular or Oval or Oblong Duct.
This is very handy and useful for HVAC Engineers.