支承圈 meaning in English

backup ring
support ring

The computing results of the thesis shows that qtjs 160t railway crane ' s carrier frame has met the intensity requirements . the local stress of the contact position of carrier frame , outriggers and pins is presented . the dangerous positions of the carrier frame are pointed out
论文分析、计算结果表明， qtjs160t铁路起重机底架结构满足强度要求，论文给出了车架、支腿和销轴联接处的局部应力情况，指出车架在回转支承圈处存在应力集中部位。