当前农村中机械保有量很大，而且种类繁多。它包括农、林、牧、副、渔等各种动力机械和作业机械（如常用的汽车、拖拉机、旋耕机、农用水泵、喷雾器、磨米机等）。在有些地方，许多人只重视使用，而轻视保养和保管，因此造成了严重的使用失误，致使机械的使用寿命明显缩短... The current rural machinery holdings, and a wide range. It includes agriculture, forestry, animal husbandry, deputy, fishing and other power machinery and operating machinery (such as the common car, tractor, rotary cultivator, agricultural pump, sprayer, rice mill, etc.). In some places, many people only pay attention to the use, while neglecting the maintenance and custody, thus causing serious misuse, resulting in significantly shorter mechanical life ...