A.78B.86C.68D.90
A.轍叉心軌尖端至心軌寬40mmB.轍叉心軌尖端至心軌寬50mmC.轍叉心軌尖端至心軌寬30mmD.轍叉心軌尖端至心軌寬20mm
A.45~49B.43~49C.45~47D.42~49