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3、F3/2AAkF3/2BBkFBaoaoAaFaBAFFFaFbF0B3/23/23/2aoaoAkFkFkF3/23/22aoAFFaoaoAFFF38aoaoAAao211轴向刚度较高；轴向刚度较高；2预拉伸安装时，须加载荷较大，轴承寿命比方案预拉伸安装时，须加载荷较大，轴承寿命比方案 2低；低；3适宜中速、精度高，并可用双推适宜中速、精度高，并可用双推单推组合。单推组合。 1轴向刚度最高；轴向刚度最高；2预拉伸安装时，须加载荷较小，轴承寿命较高预拉伸安装时，须加载荷较小，轴承寿命较高3适宜高速、高刚度、高精度。适宜高速、高刚度、高精度。1轴向刚度低，与螺母位置有关；轴向刚度低，与螺母位置
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