單項(xiàng)選擇題

The heavy-duty lubricating oil with chemical has been widely introduced in recent years（）

A.additives
B.behavior
C.coolant
D.desiccant

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單項(xiàng)選擇題

Great care is dedicated to the removal of from the scavenge air（）

A.gravity
B.viscosity
C.density
D.humidity

單項(xiàng)選擇題

The top piston ring is plasma coated to give the lowest wear rate to reach the goal of two-years’ with sufficient margin（）

A.TBO
B.CEO
C.CFO
D.MCR

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