This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Vacuum Column. This is schematic diagram of typical vacuum distillation column in an oil refinery drew this myself using Microsoft's Paint program Own Mbeychok Oil distillation Technical diagrams Vacuum column
Page 2023 Free-images.com. All images are Public Domain