... markets Holland, Italy, India,Japa 1. Single-Row Four Point Contact Ball Slewing Ring( 01 series) CHARACTERISTIC OF STRUCTURE,PERFORMANCE ... , APPLICATION RANGE The Single-Row Four Point Contact Ball Slewing Ring is composed of 2 seat-rings ... Slewing Conveyer,Welding Operation Machine,Pint-size&Medium-sized Crane,and so on 2. Single-Row Four Point Contact Ball Slewing ...