指定转向球节的主要尺寸。球节被视为带有球座的单件，因此指定了球座组件。图中显示了关注的形状和参考数量。将标称直径从27毫米到50毫米的参数制成表格。

Specifies the main dimensions of steering ball joints. The ball joint is considered as being a single piece with its socket, so the ball-socket assembly is specified. A figure illustrates shapes and reference quantities of concern. Tabulates parameters for nominal diameters from 27 up to 50 mm.