有一批轴类铸坯零件，欲在两端面同时打中心孔，工件定位方案如图所示，试分析加工后这批毛坯上的中

心孔与外圆可能出现的最大同轴度误差（注：只考虑定位误差的影响） There is a batch of shaft casting billet parts that want to punch a center hole on both ends at the same time. The workpiece location scheme is shown in the figure. Try to analyze the maximum coaxiality error that may appear between the center hole and the outer circle on this batch of billets after processing (note: only the influence of location error is considered).