gearboxn.齿轮箱；变速箱gearbox control变速箱控制器gearbox adaptor齿轮箱接头gearbox dipstick齿轮箱油尺gearbox breather齿轮箱通气孔gearbox selector变速箱换挡机构gearbox of reaper收割机变速箱gearbox suspension齿轮箱悬置gearbox oil filler齿轮箱加油口Gearbox first shaft变速箱主轴gearbox input shaft齿轮箱输入轴