滚筒驱动齿轮箱润滑油油面
roller drive gearbox oil level
滚筒驱动齿轮箱检视塞
roller drive gearbox access plug
高速动车齿轮箱
Gearbox for high speed train
分动齿轮箱总成
transfer gearbox assembly
分动齿轮箱油面
transfer gearbox oil level
分动齿轮箱通气孔
transfer gearbox breather
分动齿轮箱加注口塞
transfer gearbox filler plug
发动机飞轮齿轮箱
engine flywheel gear case