活塞冷却喷嘴对准工具
piston cooling jet alignment tool
活塞冷却喷嘴集油沟
piston cooling jet gallery
piston cooling jet oil gallery
活塞冷却喷嘴位置检查
piston cooling jets position check
piston cooling jet position check
活塞冷却喷嘴校正
piston cooling jet alignment
活塞冷却喷嘴总成
piston cooling jet assembly
阀冷却变频器
frequency converter for cooling of valves