hi..alll Air - run engines...on wht principal these work... and whats the concept behind this all?

as am new to CE,plz make me aware abt threads...there usage..n other stuff.. thanks

hi ajay... 😒 jst a person.. yes one thing i lik abt him is tht he has been simply in his movies....not lik tht salman or other...showing off...disturbing indian culture......