单项选择题
The heavy-duty lubricating oil with chemical has been w...
单项选择题The heavy-duty lubricating oil with chemical has been widely introduced in recent years（）
A.additives B.behavior C.coolant D.desiccant
Great care is dedicated to the removal of from the scav...
单项选择题Great care is dedicated to the removal of from the scavenge air（）
A.gravity B.viscosity C.density D.humidity
The top piston ring is plasma coated to give the lowest...
单项选择题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
