拖拉机在正常工作情况下,排气管排出的废气应当是淡灰色的。如冒蓝烟,说明机油进入燃烧室造成烧机油。这一方面使机油消耗量增大,造成浪费,加大了农机作业成本。二是容易积 Tractor under normal operating conditions, the exhaust pipe exhaust emissions should be light gray. If you take blue smoke, indicating oil into the combustion chamber caused by burning oil. On the one hand, oil consumption increased, resulting in waste, increased operating costs of agricultural machinery. The second is easy to plot