Obtain swiftly a diameter or a rectangular size (rounded in increments of 2") to get the right FPM/CFM of an air flow.
-editing the right option in rectangle will update the FPM without changing the left option of rectangle.
-Added remove ads button
-Email me if you have small requests.
-new layout, ads take less space on phones.
9Apps 4.9
![국세청 홈택스 [손택스] on 9Apps](https://sg-res.9appsdownloading.com/sg/res/jpg/f7/df/69cc2f90120ec331db2630e0f5b6-6dh.jpg?x-oss-process=style/jmq200)
