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分析目前股绳机有轴式和无轴式工字轮筐架存在的问题，着重介绍两种新式无轴式工字轮筐架的结构设计特点。
At present, the existing problems of the existing shaft-type and shaft-less type I-frame are analyzed, and the structural design features of two new type of shaft-less type I-frame are introduced emphatically.