lubrication by oil circulation

lubrication oil是什么意思|lubrication... ... lubrication oil sump ： 滑油池 lubrication by oil circulation ： 油循环润滑 ...

润滑毛毡,lubri... ... ) pad lubrication 毡垫润滑 ) lubrication by oil circulation 毡片润滑 ) oil pad lubrication 油毡润滑 ...