[ 4个浅绿色[不带轴承] ]
[ 4个杏色[不带轴承] ]
[ 4个黑色[不带轴承] ]
[ 4个白色[不带轴承] ]
[ 4个紫色[不带轴承] ]
[ 4个紫色透明[不带轴承] ]
[ 4个浅绿色[每个轮子带2个轴承] ]
[ 4个杏色[每个轮子带2个轴承] ]
[ 4个黑色[每个轮子带2个轴承] ]
[ 4个白色[每个轮子带2个轴承] ]
[ 4个紫色[每个轮子带2个轴承] ]
[ 4个紫色透明[每个轮子带2个轴承] ]