The upper half member 22U comprises a banjo half portion 24 and opposite axle beam half portions 26R and 26L outwardly laterally extending from opposite sides of the banjo half portion 24.

• 上半部由一个会员22U班卓琴半部分24和对面轴梁半部分26R和26L表面横向延伸的两侧班卓琴半部分24 。