[ WZ021-白色1双 ]
[ WZ021-黑色1双 ]
[ WZ021-红色1双 ]
[ WZ021-(2白+2黑+1红)=5双 ]
[ WZ021-(2白+2红+1黑)=5双 ]
[ WZ021-(2黑+2红+1白)=5双 ]