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1.Used for YUTONG bus 2.Compact,less energy 3.Lower oil flow rate 4.Long working life The recirculating ball construction results in a friction free contact between the nut and the worm. When the steering wheel turns to the left, the ball bearings roll between the worm and the nut and work their way upward in the worm groove. When the ball bearings reach the top of the nut, they enter two ball guides and are directed downward into the worm groove at a lower point. When the steering wheel is turned to the right, the ball bearings circulate in the opposite direction. //586 || this.height>586){ if(this.width>this.height){ setImgSizeWH("",this,586,586*this.height/this.width); }else{ setImgSizeWH("",this,586*this.width/this.height,586); } } } } //]]>