revolving door

noun
1
a type of door in an entrance to a large building that turns around in a circle as people go through it
در گردان, در چرخنده, در چرخشی, درب چرخان
2
used to talk about a place or an organization that people enter and then leave again very quickly
محل زودگذر, محل گذرا, سازمان بی‌ثبات
The company became a revolving-door workplace.