selectorn.挑选者；选择器selector shelf选择器架selector lever选速(器)杆, (悬挂装置的)分配器手柄selector blade分选器叶片selector relay选择器继电器,选择继电器selector block选择字块selector stage选组级selector spring快慢机簧selector magnet选择磁铁selector marker选择指示器selector button选择按钮