最佳定向方向
optimal oriented direction
变速箱方向选择
transmission direction selection
变速箱方向选择器
transmission direction selector
定向选育
Screening
selection of directive breeding
directive breeding
dirdected breeding
directed strain-screening
方向选择滑阀
direction selection spool
方向选择器开关
direction selector switch
方向选择手柄
direction selection lever
方向选择性插值
direction-selective interpolation